To provide a device for feeding in an aquarium, easily applicable to a wide variety of aquatic life with a simple structure by anyone, free from trouble of scattering of feed in the aquarium and evenly feeding the feed to week aquatic life as well as strong aquatic life.

There is provided the feeding device 1 to supply the feed 70 to an aquatic life growing in the aquarium 50. The device is provided with a body 10 formed to a rod-shape, a thrusting part 12 formed at one end of the body 10 and thrust into soil 54 placed in the aquarium 50, and umbrella members 20, 22 opening downward and longitudinally slidable relative to the thrusting part 12.