Composite switch unit for vehicle

A plurality of switchable contacts (11a) are provided on a relaying printed circuit board (11) for centralized relaying of signals between a vehicle per se and a switch unit; a plurality of contact change-over members (60s) for connecting and disconnecting the switchable contacts (11a) are mounted on this printed circuit board; a drive member oscillatable from outside to inside of a box-shaped housing (1) is fitted to each end of the housing (1) in a lengthwise direction; the printed circuit board (11) is fixed to an outer part of an under face of the housing (1) to cause the contact change-over members (60s) to face the inside of the housing; the drive members and the contact change-over members (60s) are engaged with each other to oscillate the drive members; and the switchable contacts on the printed circuit board (11) are thereby changed over.