A plant culturing device easily handled by solving problems in installation space and the movement of a culturing container. In the plant culturing device, a pump (P) capable of supplying a liquid (3) stored in a tank to the culturing container is installed in a communication passage (26) for communicating the culturing container (1) capable of culturing plants with the tank (4) capable of storing the liquid (3) for culturing the plants. A support part (9) capable of supporting the culturing container over the tank is fitted to the tank, the communication passage is formed along the support part, and the pump is formed integrally with the tank.