Provided is a low height lightweight thrust slide bearing: which is capable of preventing the deformation of the ring-shaped metal plate and of reducing the generation of noise that occurs with the relative rotation of a piston rod even when a large force is applied on the metal plate via the piston rod; which is capable of preventing the intrusion of foreign matter such as dust from outside onto the sliding surfaces; and for which the number of constituent parts has been reduced. The thrust slide bearing (1) is provided with a synthetic resin bearing body (2) having a ring-shaped upper surface (5) that functions as a sliding surface, a ring-shaped metal plate (4) that is supported on the ring-shaped upper surface (5) to be freely rotatable relative to the bearing body (2) in the circumferential direction (R) around the shaft center (O), and a ring-shaped cover (3) disposed so as to cover the ring-shaped upper surface (5) and the ring-shaped metal plate (4). The ring-shaped metal plate (4) is provided with an inner disc section (44) that is formed as a unit with an outer disc section (43) and is disposed in the through hole (25) of the ring-shaped cover (3). The inner disc section (44) also functions as a reinforcing part (rib) of the outer disc section (44).