board C. As illustrated, each electric connector comprises an electrically insulative shell A, and a plurality of terminals B respectively fastened to respective terminal holes A1 in the electrically insulative shell A. Each terminal B has a contact end B1 suspended inside the electrically insulative shell A, and a mounting end B2 disposed outside the electrically insulative shell A for bonding to the tin paste C11 at the corresponding pad (contact) C1 of the circuit board C by SMT (surface mounting technology). During bonding of electronic connectors to the tin paste C11 at the pads C1 at the bottom side of the circuit board C after installation of respective electronic connectors in the top side of the circuit board C, the tin paste C11 at the mounting endsprovide a tin paste overflow-protective electric connector, which is suitable for fastening to a circuit board by SMT (surface mounting technology). To achieve these and other objects of the present invention, the tin pate overflow-protective electric connector comprises an electrically insulative shell and at least one terminal respectively fastened to a respective terminal hole in the electrically insulative shell. Each terminal has a mounting end extended out of the respective terminal hole for fastening to a circuit board, a contact end suspended inside the electrically insulative shell for the connection of a matching electric connector, and a tin paste accumulation hole disposed inside the electrically insulative shell adjacent to one end of the corresponding terminal hole and adapted to collect an overflow of tin paste during surface mounting