Crutch with easily adwstable length

A crutch with easily adjustable length, comprising:

• an upper body having a support base formed at an upper portion thereof so as to be supported on one side of a user's body, a receiving space formed therein, and an open lower portion;
• a lower body that is coupled to a lower portion of the upper body so as to be movable in a vertical direction, and has a plurality of engaging portions formed in the longitudinal direction on one side thereof;
• a locking member that is installed on one side of the upper body so as to be movable in inward and outward directions of the upper body, and is configured such that, when moved inwardly, one side thereof is engaged with the engaging portion to restrain a movement of the lower body;
• an elastic member interposed between the upper body and the locking member to provide an elastic force to the locking member in an inward direction of the upper body;
• a power transmission member formed on one side of the locking member;
• and
• a driving unit that is installed on one side of the upper body so as to be movable in a vertical direction, and is configured to press one side of the power transmission member when moved in either of upward or downward directions, thereby causing the locking member to move outwardly from the upper body.