To enable the effective water purification by performing water purification of a water tank for land culture using ozone, and thereby solve locational restriction, reduce facility cost and simplify its maintenance and management.

A land culture apparatus, which raises fishery products such as fries or juvenile shrimps in a water tank 1 placed on land, has a waterway 4 formed with a partitioning wall 3 in the water tank. The waterway 4 is provided with a waterwheel 11 for circulating water in the water tank 1 and an air bubble disperser 21 for dispersing and discharging the ozone fed from an ozonizer 22 into water in the water tank. The water depth at the location of the air bubble disperser 21 is set deeper than the water depth at the other place. Preferably, the waterway 4 is formed by a partition wall 3 placed in parallel to a side wall of the water tank 1, and at each of both ends of the waterway 4, a net 6 is placed to prevent intrusion of raising lives.