Provision of a timepiece which, although it can suppress a malfunction of the display body in the case, can lightly rotate the operation member causing the display body to operate in conjunction therewith, and which exhibits high level of reliability in waterproof performance around the operation member. To a case 12 to which a pipe 28 is fixed, there is mounted an operation member 41 conjunction-moving a display body 17 in the case 12 so as to be movable between an operating position and a setting position. One of the pipe 28 and a shaft portion 43 of the operation member 41 inserted into the same has a first annular contact surface 29, and a second annular contact surface 30 forming a diameter different from the diameter that the contact surface 29 forms, and an annular slope 31 extending between these contact surfaces. The other has an annular opposing surface 44 opposite each of the above surfaces. A packing 48 capable of elastic deformation and configured to effect waterproofing between the pipe 28 and the shaft portion 43 is mounted to the other so as to protrude from the annular opposing surface 44. At the operating position, the packing 48 is brought into contact with the annular contact surface forming a wide gap between itself and the annular opposing surface 44, and, at the setting position, the packing 48 is brought into contact with the annular contact surface forming a narrow gap between itself and the annular opposing surface 44.