A cell suction system that supports suction work of a substance within a cell (102a, 402a, 802a), the cell suction system comprising: a suction section (103, 403, 803) including a tubular tip (104, 404, 604, 804) configured to suction the substance from the inside of the cell received in a container (102, 402, 802); a detection section (A1, A4, A8) configured to acquire information on a front end part (104T, 404T, 604T, 804T) of the tip; and a conveyance section (105, 405, 805) configured to make the suction section three-dimensionally movable, the conveyance section being configured to move the suction section to guide the front end part of the tip attached to the suction section into one specific cell based on the information obtained in the detection section, wherein the detection section includes: an optical input/output unit (α1(α), α4(α), α8(α)) including a microscope (101, 401, 801) having an objective lens (101a, 401a, 801a) and an imaging lens (101b, 401b, 801b); and a signal-processing unit (β1(β), β4(β), β8(β)) configured to be capable of introducing and removing an optical input signal and an optical output signal into and from a light path connecting the objective lens and the imaging lens, and wherein the suction section and the optical input/output unit are configured such that the direction of the light path connecting the objective lens and the imaging lens and a longitudinal direction including the front end part of the tip maintain a parallel positional relationship. a suction section (103, 403, 803) including a tubular tip (104, 404, 604, 804) configured to suction the substance from the inside of the cell received in a container (102, 402, 802); a detection section (A1, A4, A8) configured to acquire information on a front end part (104T, 404T, 604T, 804T) of the tip; and a conveyance section (105, 405, 805) configured to make the suction section three-dimensionally movable, the conveyance section being configured to move the suction section to guide the front end part of the tip attached to the suction section into one specific cell based on the information obtained in the detection section, wherein the detection section includes: an optical input/output unit (α1(α), α4(α), α8(α)) including a microscope (101, 401, 801) having an objective lens (101a, 401a, 801a) and an imaging lens (101b, 401b, 801b); and a signal-processing unit (β1(β), β4(β), β8(β)) configured to be capable of introducing and removing an optical input signal and an optical output signal into and from a light path connecting the objective lens and the imaging lens, and wherein the suction section and the optical input/output unit are configured such that the direction of the light path connecting the objective lens and the imaging lens and a longitudinal direction including the front end part of the tip maintain a parallel positional relationship. an optical input/output unit (α1(α), α4(α), α8(α)) including a microscope (101, 401, 801) having an objective lens (101a, 401a, 801a) and an imaging lens (101b, 401b, 801b); and a signal-processing unit (β1(β), β4(β), β8(β)) configured to be capable of introducing and removing an optical input signal and an optical output signal into and from a light path connecting the objective lens and the imaging lens, and wherein the suction section and the optical input/output unit are configured such that the direction of the light path connecting the objective lens and the imaging lens and a longitudinal direction including the front end part of the tip maintain a parallel positional relationship.