Driving adapter

A driving adapter, configured to be applied to a driving head of a rotary tool, the driving adapter including:

• a main body, including a socket portion, an insertion portion connected with the socket portion and a projection connected with the insertion portion in an axial direction, the socket portion including a connection hole which is quadrangular and extends along the axial direction, the connection hole being configured to be sleeved around the driving head of the rotary tool, the insertion portion being a quadrangular post and extending along the axial direction, a diametric dimension of the insertion portion being different from a diametric dimension of the connection hole, the insertion portion being configured to be assembled with a driving tool, the projection including an annular groove around the axial direction;
• an elastic retainer, being non-closed, disposed within and around the annular groove;
• and
• a cushion, disposed within the annular groove, being radially abuttable against and between the projection and the elastic retainer.