​Metsäliitto Cooperative's rules specify the tasks of the Supervisory Board. The main task of the Supervisory Board is to monitor that Metsäliitto is managed in accordance with the rules and the decisions of the Representative Council and the Supervisory Board. In addition to this, the Supervisory Board:

• elects and dismisses members of the Metsäliitto Cooperative's Board of Directors and decides on their fees;
• gives the Board of Directors instructions in far-reaching matters and matters of importance in principle;
• issues a statement for the Representative Council on the financial statements, including the consolidated financial statements, and the Board of Director’s report.

The Supervisory Board elects a Chair and Deputy Chair from among its members for one year at a time and invites a secretary. The Supervisory Board convenes as summoned by the Chair, as often as necessary or as proposed by the Board of Directors. The Supervisory Board forms a quorum when more than half the members of the Supervisory Board are present. The majority opinion shall be the decision. When the votes are even, the Chair has the casting vote, and elections are decided by drawing lots.

The Supervisory Board comprises a minimum of twenty and a maximum of thirty members elected by the Representative Council from among the members of Metsäliitto Cooperative. In addition, the Representative Council may, upon the proposal of the Supervisory Board, elect a maximum of three expert members to the Supervisory Board.

The term of office of a member of the Supervisory Board begins at the closure of the annual meeting that elected him/her and runs until the annual meeting of the Representative Council three years later. The aim of the three-year term of office is to ensure the continuity of decision-making. Regional equality is considered when electing the members of the Supervisory Board. A member of the Board of Directors may not be a member of the Supervisory Board.

A special Nomination Committee elected from among the members of the Supervisory Board prepares the election of the members of the Board of Directors in accordance with procedures approved for it. In addition, the Nomination Committee makes a proposal for the fees paid to the Board of Directors.

The Nomination Committee comprises six members of the Supervisory Board as well as the Chair and the Deputy Chair of the Supervisory Board. The Chair of the Supervisory Board acts as the Chair of the Nomination Committee, and the secretary of the Board of Directors acts as the secretary. The Committee may invite the Chair of the Board of Directors to attend their meetings as an expert member.

Members of the Nomination Committee are Matti Alatalo, Aila Haikkonen, Pirkko Laitinen, Jyrki Savolainen, Matti Turtiainen and Ilkka Uusitalo. Furthermore, Juha Paajanen, Chair of the Supervisory Board, and Ahti Siponen, Deputy Chair, are members of the Nomination Committee on the basis of their position.

In 2024, until 25 April 2024, the Supervisory Board had 34 members, 4 of whom were personnel representatives selected by different personnel groups. Following a rule change decided by the Representative Council on 28 April 2022, the Supervisory Board will no longer elect new personnel representatives, and the term of office of personnel representatives ended 25 April 2024. There were no expert members on the Supervisory Board in 2024. The Supervisory Board met 5 times and the attendance rate of the members was 98%.