There is provided a head system including: a head; a first supply channel; and a first discharge channel. The head has two groups each including a manifold which extends in a first direction and a plurality of pressure chambers each connected to the manifold and a nozzle. The two groups include a first group and a second group arranged in a second direction intersecting the first direction. The first supply channel is connected to the one end of the manifold included in the first group, and is connected to the opposite end of the manifold included the second group. The first discharge channel is connected to the opposite end of the manifold included in the first group and is connected to the one end of the manifold included in the second group.