A head chip comprising: an actuator plate having a first channel area and a second channel area disposed side by side in a first direction, a first jet channel extending in the first direction and a first non-jet channel extending in the first direction being arranged in a second direction crossing the first direction in the first channel area, and a second jet channel extending in the first direction and a second non-jet channel extending in the first direction being arranged in the second direction in the second channel area; a cover plate which has a first liquid flow channel (120, 121) communicated with the first jet channel, and a second liquid flow channel (120, 121) communicated with the second jet channel, and which is stacked on the actuator plate; and a communication plate which has a first communication hole communicated with the first jet channel in a central portion in the first direction, and a second communication hole communicated with the second jet channel in a central portion in the first direction, and which is stacked on the actuator plate at an opposite side to the cover plate, wherein protective films (110, 111) are formed respectively on an inner surface of the first jet channel, an inner surface of the first non-jet channel, an inner surface of the second jet channel, and an inner surface of the second non-jet channel; characterised in that in the actuator plate, first open apertures (53a, 53b, 90aA) which communicate an inside and an outside of the first non-jet channel with each other are formed in both end portions of the first non-jet channel in the first direction, and in the actuator plate, second open apertures (53a, 53b, 90aB) which communicate an inside and an outside of the second non-jet channel with each other are formed in both end portions of the second non-jet channel in the first direction. an actuator plate having a first channel area and a second channel area disposed side by side in a first direction, a first jet channel extending in the first direction and a first non-jet channel extending in the first direction being arranged in a second direction crossing the first direction in the first channel area, and a second jet channel extending in the first direction and a second non-jet channel extending in the first direction being arranged in the second direction in the second channel area; a cover plate which has a first liquid flow channel (120, 121) communicated with the first jet channel, and a second liquid flow channel (120, 121) communicated with the second jet channel, and which is stacked on the actuator plate; and a communication plate which has a first communication hole communicated with the first jet channel in a central portion in the first direction, and a second communication hole communicated with the second jet channel in a central portion in the first direction, and which is stacked on the actuator plate at an opposite side to the cover plate, wherein protective films (110, 111) are formed respectively on an inner surface of the first jet channel, an inner surface of the first non-jet channel, an inner surface of the second jet channel, and an inner surface of the second non-jet channel; characterised in that in the actuator plate, first open apertures (53a, 53b, 90aA) which communicate an inside and an outside of the first non-jet channel with each other are formed in both end portions of the first non-jet channel in the first direction, and in the actuator plate, second open apertures (53a, 53b, 90aB) which communicate an inside and an outside of the second non-jet channel with each other are formed in both end portions of the second non-jet channel in the first direction.