To provide a locker-switch which is capable of improving a sealing performance, minimizing a deformation and a stress in a seal and making easy in attaching a switch and a seal to a housing.

The locker-switch comprises a switch housing 20, a seal 50 and a locker button 60. The housing 20 includes an upper room 22 connecting to an outside 23, a lower room 24 containing an electric switch, and an inside base 26 separating the lower room 24 from the upper room 22 and having a cylindrical barrel 28 extending to the upper side. A seal 50 is attached on an outer surface 28a of the cylindrical barrel 28 extending to the upper side. A supporting axis of the locker button 60 is pushed in an inside opening 54 of the seal 50 so as to seal the lower room 24 from the upper room 22. A sealing function satisfies a rotation of the support rod without causing any stress around the seal.