There is provided a shift device for a manual transmission capable of improving the workability of a shift box with respect to a transmission case. According to the shift device (3) of the present embodiment, a shift box (5) includes a housing (53) that extends from a shift box body (6) towards the inside of a transmission case (2) and encloses an interlock plate 20 and a first cam member 13, and forms an opening 57 opposed to a first finger 13B. Vertical walls (54, 55) are constituted by a casing (53) other than the opening (57), and the vertical wall (54, 55) are provided with a guide member (36) and a bolt (40); a through hole is formed on the vertical wall (56); a stopper member (60) penetrates the through hole, and the through hole allows the stopper member (60) to move freely in the axial direction of a shift selection shaft (8).