A manufacture method of a liquid supply member configured by a plurality of constituting components including first and second constituting components (21, 22) for forming a liquid supply path between the first constituting component and the second constituting component, comprising: a first step of injection-molding the first constituting component between a first position of a first mold and a first position of a second mold and injection-molding the second constituting component between a second position of the first mold and a second position of the second mold; a second step of opening the first mold and the second mold so that the first position of the first mold has the first constituting component and the second position of the second mold has the second constituting component to subsequently move the first mold relative to the second mold so that the first constituting component is opposed to the second constituting component; a third step of closing the first mold and the second mold so that a first region surrounding a part in which the liquid supply path is formed in the first constituting component and a second region surrounding a part in which the liquid supply path is formed in the second constituting component are abutted to each other; and a fourth step of allowing molten resin to flow to the outer side of the first and second regions, wherein in the third step, one of the first region and the second region is pushed to the other when the first mold and the second mold are closed, and wherein, in a state prior to the closure of the first mold and the second mold in the third step, a distance between the first region and a first face of the first mold abutted to a region at an opposite face of the first region in the first constituting component is assumed as D1, and a distance between the second region and a second face of the second mold abutted to a region at an opposite side of the second region in the second constituting component is assumed as D2, in a state where the first mold and the second mold are closed in the third step, a distance between the first face and the second face is assumed as D3, and the distances D1, D2, and D3 have a relation of D1+D2>D3. a first step of injection-molding the first constituting component between a first position of a first mold and a first position of a second mold and injection-molding the second constituting component between a second position of the first mold and a second position of the second mold; a second step of opening the first mold and the second mold so that the first position of the first mold has the first constituting component and the second position of the second mold has the second constituting component to subsequently move the first mold relative to the second mold so that the first constituting component is opposed to the second constituting component; a third step of closing the first mold and the second mold so that a first region surrounding a part in which the liquid supply path is formed in the first constituting component and a second region surrounding a part in which the liquid supply path is formed in the second constituting component are abutted to each other; and a fourth step of allowing molten resin to flow to the outer side of the first and second regions, wherein in the third step, one of the first region and the second region is pushed to the other when the first mold and the second mold are closed, and wherein, in a state prior to the closure of the first mold and the second mold in the third step, a distance between the first region and a first face of the first mold abutted to a region at an opposite face of the first region in the first constituting component is assumed as D1, and a distance between the second region and a second face of the second mold abutted to a region at an opposite side of the second region in the second constituting component is assumed as D2, in a state where the first mold and the second mold are closed in the third step, a distance between the first face and the second face is assumed as D3, and the distances D1, D2, and D3 have a relation of D1+D2>D3.