To ensure a space at the foot of a driver's seat by arranging the axis of a coil spring in an offset manner outward of a vehicle body relative to the axis of a suspension strut, and forming a recessed part corresponding to a pedal arm in an inner wall surface of the in-cabin side of a strut tower.

In this fitting structure, a strut tower to store a suspension strut is arranged in a space at the foot of right and left front seats. The axis O2 of a coil spring 24 to be mounted on right and left suspension struts 16 is arranged in an offset manner outward of a vehicle body relative to the axis O1 of the suspension strut 16, and a recessed part 26 corresponding to a pedal arm at a driver's seat is formed on an inner wall surface 17a on the in-cabin side of the strut tower 17.