FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of August, 2017 Commission File Number 001-15266 BANK OF CHILE

(Translation of registrant's name into English)

Ahumada 251 Santiago, Chile

(Address of principal executive offices)

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 IRl Form 40-F D

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): D

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): D

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

Yes D No IRl

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-

BANCO DE CHILE REPORT ON FORM 6-K

Attached is an English translation of a letter filed by Banco de Chile with the Chilean Superintendency of Banks, Chilean Superintendency of Securities and Insurance and local Stock Exchanges, informing of the extension of several agreements entered between Banco de Chile and Citigroup Inc.

Santiago, August 24, 2017

Mr. Eric Parrado Herrera Superintendent of Bank and Financial Institutions Present

Ref: Essential Information

Mr. Superintendent:

Pursuant to Articles 9 and 10 of Law No. 18,045 and Chapter 18-10 of the Regulations of the Superintendency of Banks and Financial Institutions, I inform you as essential information, that as of the date of this letter, Banco de Chile and Citigroup Inc. have agreed to extend the Cooperation Agreement dated October 22, 2015, in the sense that the extension of the Cooperation Agreement commences on January 1, 2018 until January 1, 2020, allowing the parties to convene before August 31, 2019, an extension for another period of two years commencing on January 1, 2020. In the event that the aforesaid extension is not convened by the parties, this agreement will be extended for a period of one year starting on January 1, 2020 until January 1, 2021. The same extension procedure may apply afterwards as many times as agreed by the parties.

Likewise, parties have extended the Global Connectivity, License and Master Services agreements entered into by Banco de Chile and Citigroup Inc.

The aforementioned extension was duly authorized by Banco de Chile's Board of Directors on Meetings N° 2,865 celebrated on August 24, 2017, according to the requirements of the Articles 146 and subsequent of the Chilean Corporations Act (Law N° 18,046).

Sincerely,

Eduardo Ebensperger Orrego Chief Executive Office

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SIGNATURE

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

Date: August 24, 2017.

Banco de Chile

/s/ Eduardo Ebensperger O. By: Eduardo Ebensperger O. CEO

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Banco de Chile published this content on 24 August 2017 and is solely responsible for the information contained herein.
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