To provide a contactless switch capable of stabilizing a detection accuracy.

The contactless switch 1 includes: a magnetic field detecting sensor 12; an operating member 4 disposed with a magnet 7 to be detected by the magnetic field detecting sensor 12; a holder 3 slidably holding the operating member 4 with respect to the magnetic field detecting sensor 12; and a switch body 2 accommodating the holder 3 and the magnetic field detecting sensor 12, wherein the magnet 7 is made into an annular shape and arranged around an axial center of the operating member 4, the magnet 7 and the magnetic field detecting sensor 12 are arranged coaxially, and an operating position of the operating member 4 is set to a position where the magnetic field detecting sensor 12 is in the center in a thickness direction of the magnet 7.