Transaction in Own Shares

Rio Tinto PLC
10 May 2006


Rio Tinto plc today acquired through Credit Suisse Securities (Europe) Ltd
50,000 of its ordinary shares at an average price of 3,270 pence per ordinary
share.  The purchased shares will all be held as treasury shares.

Following the above purchase, Rio Tinto plc holds 13,730,134 ordinary shares as
treasury shares.  The total number of ordinary shares in issue (excluding shares
held as treasury shares) is 1,058,520,412.


For further information, please contact:

Investor Relations
Nigel Jones
Office: [phone]
Mobile: [phone]


Secretarial Department

Matthew Whyte
Office: [phone]

Website: www.riotinto.com


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