A liquid dispenser to supply liquid to an animal, comprising: a tank having an upper opening; a pump provided in the tank; a pipe configured to transfer liquid discharged from the pump to a plate provided above the tank and having a hole adapted to communicate with the pipe; and a liquid guide provided below the plate and having a discharge hole adapted so that liquid dropped from the plate enters the tank through the discharge hole, wherein the liquid guide and the plate cover the upper opening of the tank, and the discharge hole is provided below the upper opening of the tank, and wherein liquid supplied through the hole of the plate flows over an upper surface of the plate and falls off an edge of the plate, wherein the edge of the plate is curved, wherein the tank further includes: a wall that defines a side of the tank and that supports an outer guide wall of the liquid guide; a bottom plate defining a bottom of a space in which liquid is stored; and a container support on which the bottom plate is mounted, wherein the wall of the tank extends upward from the container support and has a radius that decreases from a lower end toward an upper end, wherein the wall of the tank includes a main wall extending from the container support and an upper wall positioned on an upper end of the main wall, wherein an inner tank wall is coupled to the upper wall and has a radius that increases from a lower end to an upper end, and wherein the outer guide wall has an outer inclined surface supported by the inner tank wall. a tank having an upper opening; a pump provided in the tank; a pipe configured to transfer liquid discharged from the pump to a plate provided above the tank and having a hole adapted to communicate with the pipe; and a liquid guide provided below the plate and having a discharge hole adapted so that liquid dropped from the plate enters the tank through the discharge hole, wherein the liquid guide and the plate cover the upper opening of the tank, and the discharge hole is provided below the upper opening of the tank, and wherein liquid supplied through the hole of the plate flows over an upper surface of the plate and falls off an edge of the plate, wherein the edge of the plate is curved, wherein the tank further includes: a wall that defines a side of the tank and that supports an outer guide wall of the liquid guide; a bottom plate defining a bottom of a space in which liquid is stored; and a container support on which the bottom plate is mounted, wherein the wall of the tank extends upward from the container support and has a radius that decreases from a lower end toward an upper end, wherein the wall of the tank includes a main wall extending from the container support and an upper wall positioned on an upper end of the main wall, wherein an inner tank wall is coupled to the upper wall and has a radius that increases from a lower end to an upper end, and wherein the outer guide wall has an outer inclined surface supported by the inner tank wall. a wall that defines a side of the tank and that supports an outer guide wall of the liquid guide; a bottom plate defining a bottom of a space in which liquid is stored; and a container support on which the bottom plate is mounted, wherein the wall of the tank extends upward from the container support and has a radius that decreases from a lower end toward an upper end, wherein the wall of the tank includes a main wall extending from the container support and an upper wall positioned on an upper end of the main wall, wherein an inner tank wall is coupled to the upper wall and has a radius that increases from a lower end to an upper end, and wherein the outer guide wall has an outer inclined surface supported by the inner tank wall.