A pad support device for supporting a pad member which is to be pressed against a disk member accomodated in a jacket. A movable member is moved toward and away from the disk member. A plate member carries the pad member, and a leaf spring is formed such that the leaf spring has at least two openings. A first portion of the leaf spring between the at-least-two openings is bent in one direction out of the plane of the surface thereof to be substantially arch-shaped while at-least-two second portions of the leaf spring are bent in a direction in which the first portion is bent to also be substantially arch-shaped. The first portion is secured to one of the movable member and the plate member, while the second portions are secured to the other of the movable member and the plate member, whereby the plate member is resiliently suspended from the movable member.