Moody's revised Metso's rating outlook to positive

Metso Corporation's stock exchange release on December 22, 2011 at 9:30 a.m. local time

Moody's Investor's Service has affirmed Metso's Baa2 long-term credit rating and
changed the outlook from stable to positive.

Metso is a global supplier of sustainable technology and services for mining,
construction, power generation, automation, recycling and the pulp and paper
industries. We have about 29,000 employees in more than 50 countries.

For further information, please contact:
Pekka Hölttä, Senior Vice President, Corporate Treasurer, Metso, tel.
+358 20 484 3195

Metso Corporation

Harri Nikunen

Juha Rouhiainen
VP, Investor Relations

NASDAQ OMX Helsinki Ltd