A shift control device in which a number of times that an angle change amount per a defined time period is successively equal to or less than a determined value is calculated, when a rotation angle of a shift shaft is equal to or more than a threshold value. In addition, an abutting state determination is performed that determines whether the number of times is equal to or above a threshold value, and if it is determined that there is an abutting state (namely, the shift shaft has reached an actual mechanical maximum rotation angle), processing shifts to an engagement process of a shift clutch.