The invention provides a plankton collector which comprises a vertical rod and a cross rod, wherein the cross rod is fixedly connected at one end of the vertical rod. Rings are fixedly connected with two ends of the cross rod, primary filtering screens cover the rings, collecting screens are fixedly connected on the rings, the collecting screens includes a zooplankton collecting screen and a phytoplankton collecting screen, and the hole diameter of the zooplankton collecting screen is different from that of the phytoplankton collecting screen. The plankton collector can simultaneously catch phytoplankton and zooplankton and is simple to operate, and time and labor are saved.