To provide an operation device for a vehicle, which can accurately specify which user in the users seated on both seats respectively performs the operation of an operation knob operable from both sides of right and left seats, in a simple structure.

In the operation device 1 for the vehicle provided with the operation knob 4 rotatively operable from the users of right and left both seats of the vehicle, the contact position of each finger in contact with the outer peripheral surface 21 of the operation knob 4 is detected by a contact position detecting part 21S and a control part 10 specifies a multifinger contact region 21T comprising a plurality of adjacent contact positions and a thumb contact region 21P present apart from the region 21T from the detected contact positions and specifies that which user in the users seated on the right and left seats of the vehicle is the operator of the operation knob 4 based on the positional relation of the contact regions 21T, 21P.