To provide a mounting structure for mounting a strut type suspension for a vehicle such as a four-wheel automobile on a vehicle body via a thrust sliding bearing, maintaining smooth steering force for a longer period during steering operation by preventing the entry of dust, rainwater and muddy water from the outside into a space where a thrust sliding bearing piece is arranged without providing a dust cover or the like separately and producing less degradation of sliding property resulting from the entry of dust, rainwater and muddy water.

The mounting structure 64 having the thrust sliding bearing 1 arranged between a mounting means 63 and an upper spring supporting means 66 for a coil spring 61 comprises a synthetic resin lower side case 2, an synthetic resin upper side case 3 superimposed on the lower side case 2, and the synthetic resin annular plate thrust sliding bearing piece 4 arranged between the upper and lower side cases 3, 2.

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