The utility model discloses a collector for attached algae. The collector for the attached algae is characterized by comprising a floater, an inverted U-shaped frame and not less than two collector bodies, wherein the foam floater is connected on the inverted U-shaped frame by a rope; and the collector bodies are in parallel inserted on the inverted U-shaped frame. The collector for the attached algae is used to solve the inconvenience, which is caused by the changes of natural factors such as water level and the like, for collecting the attached algae, thus the attached algae which is at the same position and different water layers is conveniently collected, and simultaneously, the accuracy for measuring the collecting area of the attached algae is improved.