A laundry treatment apparatus comprising: a cabinet; a drawer retractably provided in the cabinet; an accommodation unit (4, 5) provided at the drawer and having a space for containing washing water; a guider comprising: a first body rotatably coupled to the cabinet, and a second body rotatably coupled to the first body and the drawer, and configured to connect the first body to the drawer; a supply unit connected to a water supply source; a water supply channel configured to supply water between the supply unit and the accommodation unit (4, 5), the water supply channel comprising: a first supply channel provided inside the first body as an internal channel; a connecting pipe configured to connect the first supply channel with the supply unit; and a second supply channel provided along the second body and configured to supply washing water from the first supply channel to the accommodation unit; a discharge unit configured to discharge washing water from the accommodation unit (4, 5) to the outside of the accommodation unit; and a water discharge channel configured to guide washing water supplied from the discharge unit to the outside of the cabinet, the water discharge channel comprising: a first discharge channel provided inside the first body as an internal channel; a first water discharge pipe configured to connect the first discharge channel with the discharge unit; and a second water discharge pipe configured to connect the first discharge channel with the outside of the cabinet, characterized in that the first body is configured for, when positioned at an upper portion of the rear surface of the drawer, accommodating an upper edge of the rear surface of the drawer, such that the first supply channel is positioned between an upper surface of the cabinet and an upper surface of the drawer and the first discharge channel is positioned between a rear surface of the cabinet and a rear surface of the drawer. a cabinet; a drawer retractably provided in the cabinet; an accommodation unit (4, 5) provided at the drawer and having a space for containing washing water; a guider comprising: a first body rotatably coupled to the cabinet, and a second body rotatably coupled to the first body and the drawer, and configured to connect the first body to the drawer; a first body rotatably coupled to the cabinet, and a second body rotatably coupled to the first body and the drawer, and configured to connect the first body to the drawer; a supply unit connected to a water supply source; a water supply channel configured to supply water between the supply unit and the accommodation unit (4, 5), the water supply channel comprising: a first supply channel provided inside the first body as an internal channel; a connecting pipe configured to connect the first supply channel with the supply unit; and a second supply channel provided along the second body and configured to supply washing water from the first supply channel to the accommodation unit; a first supply channel provided inside the first body as an internal channel; a connecting pipe configured to connect the first supply channel with the supply unit; and a second supply channel provided along the second body and configured to supply washing water from the first supply channel to the accommodation unit; a discharge unit configured to discharge washing water from the accommodation unit (4, 5) to the outside of the accommodation unit; and a water discharge channel configured to guide washing water supplied from the discharge unit to the outside of the cabinet, the water discharge channel comprising: a first discharge channel provided inside the first body as an internal channel; a first water discharge pipe configured to connect the first discharge channel with the discharge unit; and a second water discharge pipe configured to connect the first discharge channel with the outside of the cabinet, a first discharge channel provided inside the first body as an internal channel; a first water discharge pipe configured to connect the first discharge channel with the discharge unit; and a second water discharge pipe configured to connect the first discharge channel with the outside of the cabinet, characterized in that the first body is configured for, when positioned at an upper portion of the rear surface of the drawer, accommodating an upper edge of the rear surface of the drawer, such that the first supply channel is positioned between an upper surface of the cabinet and an upper surface of the drawer and the first discharge channel is positioned between a rear surface of the cabinet and a rear surface of the drawer.