Abstract: A hair trimming device for moustaches and eyebrows which has a replaceable blade. The blade is held between a pair of plates. The blade is curved to provide a perfect cut, and the plates are likewise curved. The plates are hinged and can be quickly swung from open to close position and simple means are provided for locking the blades in position. In one form, a handle receives a flexible connector which is fastened to the blade supporting plate. The flexible connector can be moved along the handle to a position in which the plates are taughtly held against the handle and the blade is securely positioned between the plates. When moved in the opposite direction, the flexible member can be flexed to permit opening of the plates and replacement of the blade.