Surgical instrument

A surgical instrument mountable on a surgical robot, the surgical instrument comprising:

• an end tool including one or more jaws and having at least one degree of rotational freedom;
• a wire having a first side connected to the end tool;
• a connection part configured to extend in one direction, having an inner space through which the wire passes, and having a first side to which the end tool is coupled;
• and
• a driving part coupled to a second side of the connection part and configured to control a rotational motion of the end tool, the driving part including:
• a driving pulley assembly configured to be rotatable around one axis and connected to a second side of the wire;
• a plate portion on which the driving pulley assembly is disposed;
• and
• a wire guide assembly including a main body configured to be coupled to the plate portion, and at least one guide portion disposed on the main body and configured to guide a path of the wire.