Webcast Alert: The Thomson Corporation to Report First-Quarter 2006 Results

STAMFORD, Conn., 04/20/2006

The Thomson Corporation (NYSE: TOC; TSX: TOC) announces the following Webcast:

Who:
President and CEO Richard J. Harrington and Executive Vice President and CFO Robert D. Daleo

What:
Presentation and Discussion of First-Quarter 2006 Results for The Thomson Corporation

When:
April 27, 2006 @ 9:00 a.m. ET

Where:
www.thomson.com

How:
Live over the Internet – To participate in the webcast, visit www.thomson.com and click on “Investor Relations” at the top of the page and then “Executive Presentations” at the left side of the page.

The webcast will be archived at www.thomson.com.

The Thomson Corporation

The Thomson Corporation (www.thomson.com ), with 2005 revenues of $8.70 billion, is a global leader in providing integrated information solutions to business and professional customers. Thomson provides value-added information, software tools and applications to more than 20 million users in the fields of law, tax, accounting, financial services, higher education, reference information, corporate e-learning and assessment, scientific research and healthcare. With operational headquarters in Stamford, Conn., Thomson has approximately 40,000 employees and provides services in approximately 130 countries. The Corporation’s common shares are listed on the New York and Toronto stock exchanges (NYSE: TOC; TSX: TOC).

(Minimum Requirements to listen to broadcast: The Windows Media Player software, downloadable free from Microsoft.com and at least a 28.8Kbps connection to the Internet. If you experience problems listening to the broadcast, send an email to webcastsupport@tfprn.com.)

Contact Information

Jason Stewart

Vice President, Media Relations

The Thomson Corporation

Contact via E-mail