A footrest strap usable with a footrest of a wheelchair has a body portion having a first end portion, a second end portion, and a center portion. The footrest strap also has a male interlocking member formed at the first end portion, a female interlocking member formed at the second end portion, where the male interlocking member and the female interlocking member are adapted to form an interlocking means. Moreover, the footrest strap has a receptacle formed on the body portion at an offset position that is away from the center portion. The receptacle is formed with a first end and a second end that is opened and adapted for allowing a supporting screw of the footrest to be introduced into a space therein.