TransCanada Annual Meeting of Shareholders and First Quarter 2006 Teleconference and Webcast Advisory

CALGARY, Alberta – April 18, 2006 – (TSX: TRP) (NYSE: TRP) – TransCanada Corporation will hold its Annual Meeting of Shareholders beginning at 10:30 a.m. (Mountain) / 12:30 p.m. (Eastern) on Friday, April 28, 2006. The meeting will take place at the Roundup Centre (Palomino Room) in Calgary, Alberta.

A live webcast of the meeting will be available on TransCanada’s website at www.transcanada.com beginning at 10:30 a.m. (Mountain) / 12:30 p.m. (Eastern). The meeting webcast will be archived and available for replay.

TransCanada Corporation will release its first quarter 2006 financial results the morning of Friday, April 28, 2006. Analysts, members of the media and other interested parties are invited to participate in a teleconference and webcast April 28 at 1:00 p.m. (Mountain) / 3:00 p.m. (Eastern) to discuss the first quarter 2006 financial results, and general developments and issues concerning the company.

To participate, please call 1-866-226-1799 or 416-340-2220 (Toronto area). Please dial in 10 minutes prior to the start of the call. No passcode is required. A live webcast of the teleconference will also be available on TransCanada’s website (www.transcanada.com).

The conference will begin with a short address by members of TransCanada’s executive management, followed by a question and answer period for investment analysts. A question and answer period for members of the media will immediately follow.

A replay of the teleconference will be available two hours after the conclusion of the call until midnight Eastern time May 5, 2006. Please call 1-800-408-3053 or 416-695-5800 (Toronto area) and enter passcode 3182874. The webcast will be archived and available for replay on www.transcanada.com.

TransCanada is a leader in the responsible development and reliable operation of North American energy infrastructure. TransCanada’s network of more than 41,000 kilometres (25,600 miles) of pipeline transports the majority of Western Canada’s natural gas production to key Canadian and U.S. markets. A growing independent power producer, TransCanada owns, or has interests in, approximately 6,700 megawatts of power generation in Canada and the United States. TransCanada’s common shares trade on the Toronto and New York stock exchanges under the symbol TRP.

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For further information, please contact:

Media Inquiries:

TransCanada
Jennifer Varey
(403) 920-7859 or Toll Free (800) 608-7859

Investor & Analyst Inquiries:

David Moneta/Myles Dougan
(403) 920-7911