A passing device configured to be coupled to a container body that accommodates content, the passing device comprising: a passing operation unit configured to guide a movement of content; a passing movement unit that is rotatably installed in the passing operation unit and is moved so that the content passes therethrough; and a detection unit that is provided in the passing operation unit and configured to detect the content discharged by rotation of the passing movement unit, wherein the detection unit includes a light receiving unit and a light emitting unit, light emitted from the light emitting unit passes through a path, through which the content is moved to be discharged, and is detected by the light receiving unit, characterized in that the light receiving unit includes a first light receiving unit disposed at an upstream side of the path through which the content is moved to be discharged, and a second light receiving unit disposed at a downstream side of the path; and in that the light emitting unit includes one or more light emitting units disposed to face the light receiving unit; and wherein a first time point at which the amount of the light detected by the first light receiving unit is changed from a state of falling within a first standard light amount range to a first reference light amount or less and then enters the first standard light amount range again is compared with a second time point at which the amount of the light detected by the second light receiving unit is changed from a state of falling within a second standard light amount range to a second reference light amount or less and then enters the second standard light amount range again; and when the first time point is the same as or earlier than the second time point, it is determined that the content is discharged. a passing operation unit configured to guide a movement of content; a passing movement unit that is rotatably installed in the passing operation unit and is moved so that the content passes therethrough; and a detection unit that is provided in the passing operation unit and configured to detect the content discharged by rotation of the passing movement unit, wherein the detection unit includes a light receiving unit and a light emitting unit, light emitted from the light emitting unit passes through a path, through which the content is moved to be discharged, and is detected by the light receiving unit, characterized in that the light receiving unit includes a first light receiving unit disposed at an upstream side of the path through which the content is moved to be discharged, and a second light receiving unit disposed at a downstream side of the path; and in that the light emitting unit includes one or more light emitting units disposed to face the light receiving unit; and wherein a first time point at which the amount of the light detected by the first light receiving unit is changed from a state of falling within a first standard light amount range to a first reference light amount or less and then enters the first standard light amount range again is compared with a second time point at which the amount of the light detected by the second light receiving unit is changed from a state of falling within a second standard light amount range to a second reference light amount or less and then enters the second standard light amount range again; and when the first time point is the same as or earlier than the second time point, it is determined that the content is discharged.