A liquid pump comprising: a casing; a shaft; a feed pipe that brings liquid from outside the casing to inside the casing; a pump mechanism that is provided inside the casing, and that includes a suction hole through which the liquid is sucked in and a discharge hole through which the liquid sucked in via the suction hole is discharged; a suction space that is extended from an opening of the feed pipe to an inlet of the suction hole in the casing, and that connects a flow path formed by the feed pipe to the suction hole; and a discharge space that is positioned on a side with an outlet of the discharge hole in the casing and that connects to the discharge hole, wherein the suction space includes a gas accumulation area that is positioned above a center of the opening of the feed pipe on a side with the casing, in a cross section view of the liquid pump (1a, 1b, 1c), and that accumulates gas brought into the casing through the feed pipe together with the liquid to separate the gas from the liquid, and wherein the pump mechanism sucks in the liquid via the suction hole and discharges the liquid via the discharge hole by rotation of the shaft, characterized in that when a first line segment and a second line segment are projected on a plane orthogonal to the rotation axis of the shaft, an angle (θ) between the first line segment and the second line segment is in a range of 90° to 270°, the first line segment connecting the center of the opening at the end of the feed pipe on the side with the casing and a rotation axis of the shaft, the second line segment connecting a center of the inlet of the suction hole and the rotation axis of the shaft. a casing; a shaft; a feed pipe that brings liquid from outside the casing to inside the casing; a pump mechanism that is provided inside the casing, and that includes a suction hole through which the liquid is sucked in and a discharge hole through which the liquid sucked in via the suction hole is discharged; a suction space that is extended from an opening of the feed pipe to an inlet of the suction hole in the casing, and that connects a flow path formed by the feed pipe to the suction hole; and a discharge space that is positioned on a side with an outlet of the discharge hole in the casing and that connects to the discharge hole, wherein the suction space includes a gas accumulation area that is positioned above a center of the opening of the feed pipe on a side with the casing, in a cross section view of the liquid pump (1a, 1b, 1c), and that accumulates gas brought into the casing through the feed pipe together with the liquid to separate the gas from the liquid, and wherein the pump mechanism sucks in the liquid via the suction hole and discharges the liquid via the discharge hole by rotation of the shaft, characterized in that when a first line segment and a second line segment are projected on a plane orthogonal to the rotation axis of the shaft, an angle (θ) between the first line segment and the second line segment is in a range of 90° to 270°, the first line segment connecting the center of the opening at the end of the feed pipe on the side with the casing and a rotation axis of the shaft, the second line segment connecting a center of the inlet of the suction hole and the rotation axis of the shaft.