To provide a rotating shaft capable of preventing relative rattling of a shaft body and a cylindrical body for a long period without affected by abrasion of a pressing body, and improving rigidity of a fitting portion to the cylindrical body, of the shaft body.

Inclined faces 21, 31 inclined to the axial direction and kept into contact with each other are formed on one end of the shaft body 2 axially movably fitted to the cylindrical body 1 and rotated integrally with the cylindrical body 1, and a pressing body 3 for pressing the shaft body 2 to one side of an inner peripheral face of the cylindrical body 1, a bolt 4 axially extending from a central portion of the inclined face 21 is mounted on the inclined face 21 of the shaft body 2, a fitting hole 32 for slidably fitting the bolt 4 is formed on the pressing body 3, and a disc spring 8 is mounted for energizing the pressing body 3 toward the inclined face 21 of the shaft body 2, thus the pressing body 3 and the shaft body 2 are radially deflected.