A thrust sliding bearing for supporting a load applied to a shaft member in a thrust direction while allowing rotation of the shaft member, comprising: an upper case, which is to be mounted, in a state that the shaft member is inserted therein, on a mounting mechanism for mounting the shaft member on a support object; a lower case, which is to be mounted, in a state that the shaft member is inserted therein, on a spring seat at an upper end of a coil spring combined with the shaft member, and which is rotatably combined with the upper case so that an annular space is formed between the lower case and the upper case; and an annular center plate, which is to be placed, in a state that the shaft member is inserted therein, in the annular space, and which functions as a bearing body for realizing relative rotation between the upper case and the lower case, wherein: the annular space is filled with lubricating grease; and the center plate comprises: a bearing surface to be in slidable contact with a support object surface of the upper case; and a pair of annular protrusions (47, 48) provided along the circumferential direction of the center plate respectively at inner and outer peripheral edges of the bearing surface; characterized in that the center plate further comprises recesses formed in the bearing surface. an upper case, which is to be mounted, in a state that the shaft member is inserted therein, on a mounting mechanism for mounting the shaft member on a support object; a lower case, which is to be mounted, in a state that the shaft member is inserted therein, on a spring seat at an upper end of a coil spring combined with the shaft member, and which is rotatably combined with the upper case so that an annular space is formed between the lower case and the upper case; and an annular center plate, which is to be placed, in a state that the shaft member is inserted therein, in the annular space, and which functions as a bearing body for realizing relative rotation between the upper case and the lower case, wherein: the annular space is filled with lubricating grease; and the center plate comprises: a bearing surface to be in slidable contact with a support object surface of the upper case; and a pair of annular protrusions (47, 48) provided along the circumferential direction of the center plate respectively at inner and outer peripheral edges of the bearing surface; characterized in that the center plate further comprises recesses formed in the bearing surface. the annular space is filled with lubricating grease; and the center plate comprises: a bearing surface to be in slidable contact with a support object surface of the upper case; and a pair of annular protrusions (47, 48) provided along the circumferential direction of the center plate respectively at inner and outer peripheral edges of the bearing surface; a bearing surface to be in slidable contact with a support object surface of the upper case; and a pair of annular protrusions (47, 48) provided along the circumferential direction of the center plate respectively at inner and outer peripheral edges of the bearing surface; characterized in that the center plate further comprises recesses formed in the bearing surface.