File No. 0-27884

SECURITIES AND EXCHANGE COMMISSION ~~Washington, D.C. 20549~~

Washington, D.C. 20549

FORM 6-K

Report of Foreign Issuer
Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934

For the month of ~~November~~April, ~~2006~~2007

Macronix International Co., Ltd.

No. 16 Li-Hsing Road,
Science-Based Industrial Park
Hsinchu, Taiwan, Republic of China

[ Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.]

Form 20-F þ Form 40-F o

[ Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.]

Yes o No þ

[ If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82: __________.]

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Table of Contents

Monthly Sales Report- November 2006			3
Monthly Sales Report — April 2007			3
Regulated Announcement for the month of November 2006			4 ~ 5
Regulated Announcement for the month of April 2007			4 ~ 5
Signatures			6

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MACRONIX INTERNATIONAL CO., LTD. ~~For the month of November 2006~~

~~This~~For ~~is to report~~ the ~~changes~~month ~~or status~~ of ~~1) Sales volume 2) Funds lent to other parties 3) Endorsements and guarantees 4) Financial derivative transactions for the period of November~~April ~~2006.~~ 2007

This is to report the changes or status of 1) Sales volume 2) Funds lent to other parties 3) Endorsements and guarantees 4) Financial derivative transactions for the period of April 2007.

Sales volume (NT$ : Thousand)

Time

Item

~~2006~~2007

~~2005~~2006

Changes

(%)

November

Invoice amount

2,186,861

2,115,180

+71,681

+3.39%

April

Invoice amount

1,936,521

1,845,274

+91,247

4.94%

November

Net Sales

2,169,604

2,107,355

+62,249

+2.95%

April

Net Sales

1,930,434

1,843,486

+86,948

4.72%

Funds lent to other parties (NT$ : Thousand) :

Bal. As of

Limit of lending

October, 2006 end

November, 2006 end

Limit of lending

March, 2007 end

April, 2007 end

MXIC

1415,~~914~~977,~~542~~394

MXIC’s subsidiaries

6,~~321~~305,~~001~~552

Endorsements and guarantees (NT$ : Thousand) :

	Limit of endorsement		~~November~~April		Bal. As of period end
MXIC		1415,~~914~~977,~~542~~394		0		1,~~900~~951,~~398~~966
MXIC’s subsidiaries		~~186~~5,~~937~~038		0		0
MXIC endorses for subsidiaries				0		1,~~900~~951,~~398~~966
MXIC’s subsidiaries endorses for MXIC				0		0
MXIC endorses for PRC companies				0		0
MXIC’s subsidiaries endorses for PRC companies				0		0

Financial derivatives transactions (NT$ : Thousand) 4-1 Trading purpose : None

				Option
				Sell				Buy
		Future		Call		Put		Call		Put		Forward		Swap		Others
Margin Payment			—		—		—		—		—		—		—		—
Premium Income (Expense)			—		—		—		—		—		—		—		—
Outstanding Contract	Notional Amount		—		—		—		—		—		—		—		—
	Mark to Market Value		—		—		—		—		—		—		—		—
Expired Contract	Notional Amount		—		—		—		—		—		—		—		1,118,400
	Recognized Amount		—		—		—		—		—		—		—		2,413

4-2 Hedging purpose (for assets / liabilities denominated in foreign currencies): None

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MACRONIX INTERNATIONAL CO., LTD. ~~For the month of November 2006~~

~~This~~For ~~is to report 1)~~ the trading of directors, supervisors, executive officers and 10% shareholders of MXIC ; 2) the pledge and clear of pledge of MXIC common shares by directors, supervisors, executive officers and 10% shareholders of MXIC ; 3) outstanding units and shares of ADR ; 4) outstanding amount of Convertible Bonds by MXIC for the month of ~~November~~April ~~2006.~~2007

~~The~~ This is to report 1) the trading of directors, supervisors, executive officers and 10% shareholders of MXIC ; 2) the pledge and clear of pledge of MXIC common shares by directors, supervisors, executive officers and 10% shareholders :of MXIC ; 3) outstanding units and shares of ADR by MXIC for the month of April 2007.

Number of

shares held when

elected (for

Directors,

Number of

Number of shares

Supervisors and

shares held as

held as

Title

Name

Executive Officers)

October 31, 2006

November 30, 2006

Changes

Executive Director

Ding Hwa Hu

1,020,867

1,020,000

-867

Associate Vice President

C.D. Lin

1,107,123

1,037,123

-70,000

Associate Vice President

Paul Yeh

3,833,418

3,783,418

-50,000

The trading of directors, supervisors, executive officers and 10% shareholders : None

The clear of pledge of MXIC common shares by directors, supervisors, executive officers and 10% shareholders : None

The pledge of MXIC common shares by directors, supervisors, executive officers and 10% shareholders : None

Outstanding units and shares of ADR :

Outstanding of units on	Outstanding of shares on		Outstanding of units on		Outstanding of shares on
October 31, 2006	October 31, 2006		November 30, 2006		November 30, 2006
March 31, 2007	March 31, 2007		April 30, 2007		April 30, 2007
1,487,784.7		14,877,847		1,487,784.7		14,877,847
1,628,984.7	16,289,847		1,608,984.7		16,089,847

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MACRONIX INTERNATIONAL CO., LTD. ~~For the month of November 2006~~

~~This~~For ~~is to report 1)~~ the ~~acquisition of assets by MXIC and 2) the disposition of assets by MXIC for the~~ month of ~~November~~April ~~2006.~~ 2007

~~The~~ This is to report 1) the acquisition of assets :by MXIC and 2) the disposition of assets by MXIC for the month of April 2007.

Trade Quantity

Purchase Price

Date

Description of assets

(Unit)

(Per Set)

Trade Amount)

2006/11/28

Machinery equipment

1 Batch

JPY$2,195,500,000

The acquisition of assets : None

The disposal of assets : None

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned, thereunto duly authorized.

	MACRONIX INTERNATIONAL CO., LTD.
Date: December 22, 2006	By:	/s/ Paul Yeh
Date: May 9, 2007	By:	/s/ Paul Yeh
	Name: Paul Yeh Title: Associate Vice President of Finance Center
		Name: Paul Yeh
		Title: Associate Vice President of Finance Center

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