To provide an algae culture apparatus capable of improving culture efficiency of algae.SOLUTION: An algae culture apparatus (1) comprises: a closed-type algae culture tank (10) having a culture solution inlet (14) and a culture solution circulation outlet (15); a culture solution circulation channel (115) which is connected to the culture solution inlet (14) and the culture solution circulation outlet (15), sends culture solution (4) from the culture solution inlet (14) into the algae culture tank (10), and recovers the culture solution (4) from the culture solution circulation outlet (15); an upper part open-type culture solution guide channel (30) which leads the culture solution (4) from an upper position to a lower position of the algae culture tank (10); and a light source (40) which is arranged inside the algae culture tank (10), and irradiates the culture solution (4) inside the culture solution guide channel (30) with light.SELECTED DRAWING: Figure 2...

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