To provide a spool for a dual-bearing reels, which can keep the press-in quantity of a pressed-in line-holding pin in a prescribed quantity.

This spool 4 for the dual-bearing reels includes a spool body 9 and a line-holding pin 23. The spool body has a line-winding body 9a, the first and second flanges 9b, 9c, a hand-reeling portion 9f, and a pin-fixing portion 9h. The line-winding body is a cylindrical portion in which the outer peripheral surface and the inner peripheral surface of the spool shaft are arranged in a state forming a space therebetween, and on whose outer periphery a line can be wound up. The first and second flanges are formed on both the sides of the line-winding body. The hand-reeling portion is formed in a shape circularly dented in the outer peripheral surface of the line-winding body, and has a flat bottom surface. The pin-fixing portion has a penetrated hole 9i penetrated into the inner peripheral surface in the radial direction of the line-winding body on the bottom surface. The line-holding pin has a first shaft 23a pressed in the pin-fixing portion, a second shaft 23b having a larger diameter than the first shaft, and a head portion 23c having a larger diameter than the second shaft.