Computer mouse for operation of functions when using a computer, comprising a housing (10), and three control means in the form of a primary mouse button (12), a secondary mouse button (14) and a scroll means (16). The primary (12) and secondary mouse button (14) and scroll means (16) is being so arranged interrelated that the primary mouse button (12) is located between the scroll means (16) and the secondary mouse button (14). The secondary mouse button is preferably substantially vertically placed and made of a material or coated with a coating that gives increased friction.