An endoscope includes: a protection sheath that forms an insertion unit; a pipe-like case that is connected to a proximal end side of the protection sheath; a distal end optical system that is provided at a distal end of the protection sheath and that defines a distal end side of a sealed space formed in the protection sheath and the case; a partition wall that is provided in the case, is perpendicular to an insertion axis of the insertion unit, and defines a proximal end side of the sealed space; a shaft member that is inserted into the protection sheath and that is rotatable relative to the protection sheath in a direction around the insertion axis; an image pickup unit that is provided at a distal end of the shaft member and that picks up an image of light passing through the distal end optical system; and a magnet coupling which includes a first magnet provided in the sealed space and a second magnet provided outside the sealed space with the partition wall interposed therebetween and of which the first magnet is connected to a proximal end side of the shaft member. The magnet coupling and the case are rotatable relative to each other in the direction around the axis.