A water purifying apparatus comprising: a plurality of heads for detachably mounting a plurality of filters, respectively, the plurality of heads each having an inlet part for introducing water and an outlet part for discharging water; and a mounting member to which the plurality of heads are mounted in parallel, the mounting member including a plurality of rotation supporting parts rotatably supporting the heads and accommodating the inlet parts and the outlet parts of the heads therein, characterized in that the water purifying apparatus further comprises: a connecting cap mounted on the rotation supporting part to connect the inlet part of one head and the outlet part of another head with each other, wherein the connecting cap is fixed at a cap fixing part of the rotation supporting part and includes: a flow path part connected between the inlet part and the outlet part; a restricting part extending from the flow path part and being configured to be elastically deformed, the restricting part being fixed to the cap fixing part; and a cover part extending from the flow path part, the cover part covering the inlet part and the outlet part. a plurality of heads for detachably mounting a plurality of filters, respectively, the plurality of heads each having an inlet part for introducing water and an outlet part for discharging water; and a mounting member to which the plurality of heads are mounted in parallel, the mounting member including a plurality of rotation supporting parts rotatably supporting the heads and accommodating the inlet parts and the outlet parts of the heads therein, characterized in that the water purifying apparatus further comprises: a connecting cap mounted on the rotation supporting part to connect the inlet part of one head and the outlet part of another head with each other, wherein the connecting cap is fixed at a cap fixing part of the rotation supporting part and includes: a flow path part connected between the inlet part and the outlet part; a restricting part extending from the flow path part and being configured to be elastically deformed, the restricting part being fixed to the cap fixing part; and a cover part extending from the flow path part, the cover part covering the inlet part and the outlet part. a connecting cap mounted on the rotation supporting part to connect the inlet part of one head and the outlet part of another head with each other, wherein the connecting cap is fixed at a cap fixing part of the rotation supporting part and includes: a flow path part connected between the inlet part and the outlet part; a restricting part extending from the flow path part and being configured to be elastically deformed, the restricting part being fixed to the cap fixing part; and a cover part extending from the flow path part, the cover part covering the inlet part and the outlet part. a flow path part connected between the inlet part and the outlet part; a restricting part extending from the flow path part and being configured to be elastically deformed, the restricting part being fixed to the cap fixing part; and a cover part extending from the flow path part, the cover part covering the inlet part and the outlet part.