The sleeve adapter comprises a first end and a second end opposite to the first end, the first end is constructed to be a hollow sleeve, the hollow sleeve comprises a body, a hole is formed in the outer wall of the body, a
spherical body is contained in the hole, and a locking pin is arranged in the hollow sleeve. The locking pin has a
flange, a first region disposed on a side of the
flange facing the first end, and a second region disposed on the other side of the
flange facing the second end, the
spherical body protruding from the hole and beyond an edge of the outer wall of the body in a
natural state of the sleeve adapter, and the
spherical body is used for being matched with a concave part arranged on the inner side wall of a central hole of the head part of the
ratchet wrench, so that the hollow sleeve of the sleeve adapter is locked to the
ratchet wrench. According to the sleeve adapter disclosed by the utility model, the operation is convenient and the connection is firm and reliable in the connection process of the sleeve adapter and a
ratchet wrench, and the operation is also convenient in the unlocking process.