The present invention relates to a double-sided open-type plumbing box for wiring electric wires, capable of facilitating wiring work by a simple structure and simultaneously providing convenience in manufacturing and assembling the box. According to the present invention, provided is a double-sided open-type plumbing box for wiring electric wires, comprising: a box main body (31) in which an inlet (33) and an outlet (34), through which a cable (C) goes in and out, are formed at both sides of an inner space (32) of a predetermined size, and first and second openings (35, 36) are formed to open one side and the other side of the inner space (32); and first and second covers (37, 38) which are configured to open and close the openings (35, 36), respectively.