There is provided a slide bearing capable of preventing or reducing the likelihood of the occurrence of galling while being provided with an oil groove in its inner periphery. A cylindrical main bearing 2 is formed by combining an upper bearing 10 disposed on an upper side and a lower bearing 20 disposed on a lower side and rotatably supports a crank journal 1 a through an oil film between the cylindrical main bearing 2 and the crank journal 1 a. The lower bearing 20 includes an oil groove 23 formed in a low-load region L set in a range in which a pressure from the oil film is low on the inner periphery of the lower bearing 20.