Conference call regarding Interim Report January-March 2005

Biacore International AB will release its Interim Report January-March 2005 on Thursday, April 28, 2005. To give you an opportunity to discuss the Company’s results with management, we hereby invite you to take part in a conference call on Thursday, April 28, 2005 at 8.30 am EST – which is 1.30 pm UK time and 2.30 pm CET. In case you wish to participate in the call, please call the following number in the UK a few minutes before the conference is due to start. +44 (0) 207 162 0187 Password: Biacore A replay of the call will be available until May 5, 2005. To listen, please call the following number: +44 (0) 207 031 4064 Access code: 657298 Sincerely yours, Biacore International AB Investor Relations Uppsala, April 25, 2005