Head module and head unit

A head module comprising:

• a liquid discharging head including:
• a channel unit including a pressure chamber, a nozzle communicating with the pressure chamber, and a channel communicating with the pressure chamber;
• and
• an energy-applying mechanism configured to apply a discharge pressure to a liquid in the pressure chamber of the channel unit;
• a driver IC electrically connected to the energy-applying mechanism;
• a heat sink thermally connected to the driver IC;
• and
• a fan arranged on one side in a first direction with respect to the heat sink,
• wherein the heat sink includes:
• a base part expanding in a plane orthogonal to the first direction;
• and
• a plurality of fins including:
• a first fin extending from the base part to the one side in the first direction, a second fin extending from the base part to the one side in the first direction, and a third fin extending from the base part to the one side in the first direction,
• wherein a plane direction of a plane in which the first fin expands crosses a plane direction of a plane in which the second fin expands, and crosses a plane direction of a plane in which the third fin expands, and
• wherein the fan is arranged at a position at which the fan overlaps with the base part in the first direction, and in a space surrounded by the first fin, the second fin, the third fin and the base part.