Consent of Deloitte & Touche LLP.

We consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-121172 and 333-125808) and in the Registration Statements on Form S-8 (Nos. 333-31638, 333-38317, 33-90026, 333-116520) of our reports relating to the consolidated financial statements of Mercer International Inc. and management’s report on the effectiveness of internal control over financial reporting dated March 15, 2006, appearing in this Annual Report on Form 10-K of Mercer International Inc. for the year ended December 31, 2005.