A colonic irrigator comprising: a cleansing body having a laid down egg shape, having a spray hole formed at a lifted portion provided on the upper part thereof and having a cleansing solution channel formed therein to communicate with the spray hole; and a connector which has a part formed at one side thereof so as to be connected to a shower hose, is bent at 90 degrees such that another side thereof is connected to a lower part of the cleansing body, and has a cleansing solution channel formed therein to communicate with the cleansing solution channel of the cleansing body, wherein the cleansing body and the connector are integrated, characterised in that said part formed at one side of the connector so as to be connected to a shower hose is a screw part and in that a water pressure regulating member is provided at a side of the cleansing body, wherein the water pressure regulating member comprises: a cylinder-shaped extension portion extended from a longitudinal end of the cleansing body and having a pressure regulating hole at a side thereof; a pressure regulating channel formed at the extension portion and the cleansing body to connect the cleansing solution channel of the cleansing body and the pressure regulating hole formed at the extension portion, and a silicone band connected to the extension portion and regulating an opening of the pressure regulating hole. a cleansing body having a laid down egg shape, having a spray hole formed at a lifted portion provided on the upper part thereof and having a cleansing solution channel formed therein to communicate with the spray hole; and a connector which has a part formed at one side thereof so as to be connected to a shower hose, is bent at 90 degrees such that another side thereof is connected to a lower part of the cleansing body, and has a cleansing solution channel formed therein to communicate with the cleansing solution channel of the cleansing body, wherein the cleansing body and the connector are integrated, characterised in that said part formed at one side of the connector so as to be connected to a shower hose is a screw part and in that a water pressure regulating member is provided at a side of the cleansing body, wherein the water pressure regulating member comprises: a cylinder-shaped extension portion extended from a longitudinal end of the cleansing body and having a pressure regulating hole at a side thereof; a pressure regulating channel formed at the extension portion and the cleansing body to connect the cleansing solution channel of the cleansing body and the pressure regulating hole formed at the extension portion, and a silicone band connected to the extension portion and regulating an opening of the pressure regulating hole. a cylinder-shaped extension portion extended from a longitudinal end of the cleansing body and having a pressure regulating hole at a side thereof; a pressure regulating channel formed at the extension portion and the cleansing body to connect the cleansing solution channel of the cleansing body and the pressure regulating hole formed at the extension portion, and a silicone band connected to the extension portion and regulating an opening of the pressure regulating hole.