To provide a small-sized and light weight submergible pump capable of facilitating the inspection and replacement of a slide bearing or impeller and being easily manufactured at a low cost.

The impeller is installed to the load-side extended tip of a motor shaft 2, a suction port 4 is opened in the circumferential side direction, and the edge circumference of a discharge port 5 opened at the tip of an annular wall for surrounding the impeller 7 is formed into a flange connecting edge 8. A guide vane 11 is radially protruded from the circumference of a guide vane boss 10, the protruded edge is connected to the circumferential wall inner surface of a hose coupling 9, and the opening end circumference of the base of the hose coupling 9 is formed into a flange connecting edge 13. The discharge port-side flange connecting edge 8 is opposed and collided to the hose coupling- side flange connecting edge 13, and both the flange connecting edges 8 and 13 are attachably and detachably fastened by a clamper 14.