Disclosed are frame-connecting members such as straight, straight-curved, T-shaped and cross-shaped connecting members being used when assembling or fabricating vinyl houses, etc, and method for manufacturing the same. The frame-connecting member comprises a first connecting part, having a metal pipe shape, which connects a frame of a first direction, a second connecting part, having a metal pipe shape and corresponding to the first connecting part, which connects a frame of a second direction, and a fixed part, placed between the first connecting part and the second connecting part and molded with the molding material of a synthetic resin, which connects the connecting parts. A method for manufacturing a frame-connecting member comprises the steps of (a) forming a hole, (b) disposing an upper molding frame and a lower molding frame, (c) introducing a molding material into the fixed part, (d) releasing the upper and lower molding frames from the fixed part, (e) forming a connecting groove, and (f) inserting rods into the opposedly-placed first and second connecting parts. The frame-connecting member according to the present invention provides a straight connecting member having two-way connecting holes into which common pipe frames are inserted, a straight-curved connecting member for a curved two-way connected section, a three-way connecting member for a three-way connected section, and a four-way connecting member for a four-way connected section, respectively.