Spare tire fixing device

Disclosed is a spare tire-fixing device which comprises a rod-shaped clamping member (1) having a screw (2) at the lower end thereof and a head (3) at the upper end thereof, respectively; and a substantially disc-shaped tire presser (10) having a shaft tube (11) having first and second circular bearing seats (11a) and (11b) as both end faces thereof and a center hole into which the screw of the clamping member can be inserted, at the center thereof, and a collar (12) which is a doughnut-shaped member linked with the shaft tube via a peripheral frame (13) in the outer peripheral direction of the shaft tube and has first and second tire-pressing faces (12a) and (12b) as both end faces thereof, respectively, wherein it is a main character that difference in level corresponding to the difference between the width of a normal tire and that of a temporary tire is provided between the shaft tube and the collar.