A displacement sensor fixing device of a vertical pump is provided to fix a displacement sensor by forming a sensor insertion unit on a sensor fixing bracket at an accurate angle. A displacement sensor fixing device of a vertical pump comprises an annular sensor fixing bracket(10) and a supporting bracket(20). The sensor fixing bracket comprises the first bracket member(11) and the second bracket member. The first bracket member comprises two sensor insertion parts(13). The second bracket member has one fixing hole. The supporting bracket fixes the sensor fixing bracket to the vertical pump by using a bolt.
