A head unit includes: a structure; and a driver IC, the structure including a plurality of ejection sections, the plurality of ejection sections being divided into a first array and a second array that differs from the first array, each of the plurality of ejection sections including an actuator and ejecting a liquid corresponding to a drive signal applied to one end of the actuator, the driver IC including: a first block that is electrically connected to one end of the actuator included in the first array, and applies the drive signal to the actuator included in the first array; a second block that is electrically connected to one end of the actuator included in the second array, and applies the drive signal to the actuator included in the second array; and a third block that is electrically connected to the other end of the actuator included in the first array and the other end of the actuator included in the second array, and applies a hold signal to the actuator included in the first array and the actuator included in the second array, the driver IC being mounted on the structure so as to seal the actuator included in the first array and the actuator included in the second array, and the third block being situated between the first block and the second block when viewed perpendicular to a mounting surface of the driver IC that is mounted on the structure.