The creation discloses an alga culture apparatus including the following components: an incubating unit and a collecting unit. The incubating unit has a hollow body. The hollow body has a space therein for accommodating culture media containing algae, and an outlet hole on a bottom surface of the hollow body in communication with the space. The collecting unit is positioned beneath the bottom surface of the hollow body and in communication with the outlet hole whereby when some of the algae in the space are settled, the settled algae are collected.本創作揭露一種藻類培養裝置,包括以下元件:一培養單元及一收集單元。培養單元具有一管體,管體內部有一供含藻類之培養液承納的容置空間,且管體下表面開設有至少一個連通容置空間的導出孔。收集單元配置於培養單元之管體下表面的下方並連通管體的導出孔,用以當一部份的藻類沉降時,收集沉降部份的藻類。(1)‧‧‧培養單元(11)‧‧‧管體(12)‧‧‧進料口(13)‧‧‧出料口(14)‧‧‧容置空間(15)‧‧‧導出孔(16)‧‧‧管徑轉換單元(2)‧‧‧收集單元(3)‧‧‧閥手段