A hydroponic cultivation apparatus comprising: a cultivation tank that has a light shielding property and is configured to accommodate underground part of a plant; and a partitioning portion that has a light shielding property and that is provided so as to cover an opening at an upper end of the cultivation tank and partitions an underground space where the underground part of the plant grows and an aboveground space where aboveground part of the plant grows, the partitioning portion includes: a fixed member, a position of which is fixed with respect to the cultivation tank, and including a through hole surrounding a stem of the plant and maintains a closed state where it is suppressed that light is irradiated to the underground part of the plant; and a door member that is attached to the fixed member in a state of being movable with respect to the fixed member and changes to a closed state where it is suppressed that light is irradiated to the underground part of the plant and to an open state where it is possible to view the underground part of the plant, characterised in that the door member is a hatch door that is attached to the fixed member via a hinge and is rotatable about a rotational axis of the hinge with respect to the fixed member and in that the hydroponic cultivation apparatus further comprises a light shield member that is provided so as to cover a gap between the door member and the fixed member and can be bended along the rotational axis of the hinge when the door member is opened. a cultivation tank that has a light shielding property and is configured to accommodate underground part of a plant; and a partitioning portion that has a light shielding property and that is provided so as to cover an opening at an upper end of the cultivation tank and partitions an underground space where the underground part of the plant grows and an aboveground space where aboveground part of the plant grows, the partitioning portion includes: a fixed member, a position of which is fixed with respect to the cultivation tank, and including a through hole surrounding a stem of the plant and maintains a closed state where it is suppressed that light is irradiated to the underground part of the plant; and a door member that is attached to the fixed member in a state of being movable with respect to the fixed member and changes to a closed state where it is suppressed that light is irradiated to the underground part of the plant and to an open state where it is possible to view the underground part of the plant, a fixed member, a position of which is fixed with respect to the cultivation tank, and including a through hole surrounding a stem of the plant and maintains a closed state where it is suppressed that light is irradiated to the underground part of the plant; and a door member that is attached to the fixed member in a state of being movable with respect to the fixed member and changes to a closed state where it is suppressed that light is irradiated to the underground part of the plant and to an open state where it is possible to view the underground part of the plant, characterised in that the door member is a hatch door that is attached to the fixed member via a hinge and is rotatable about a rotational axis of the hinge with respect to the fixed member and in that the hydroponic cultivation apparatus further comprises a light shield member that is provided so as to cover a gap between the door member and the fixed member and can be bended along the rotational axis of the hinge when the door member is opened.