The invention relates to a nozzle contact control device of an injection molding machine. The nozzle contact control device comprises a servo motor for advancing a nozzle, wherein the nozzle is used for contacting with a die; a transmission device for converting a rotational movement of the servo motor into a linear movement; and an elastic member connected with the transmission device and used for generating a nozzle contact force. The servo motor is subjected to the following torque limit: the servo motor is positioned on the position on which an elastic part is compressed corresponding to the reset nozzle contact force, and the servo motor is subjected to torque limit by the torque limit value larger than the reset nozzle contact force and smaller than the nozzle contact force corresponding to the maximum compression amount of the elastic part. Thus when overlarge load is generated on the servo motor, because the servo motor rotates below the load, the overlarge load is not applied on a mechanism part of an injection unit.