A liquid jetting apparatus includes a first liquid jetting head which has a plurality of first nozzles, a head holder to which a first liquid jetting head is fixed, a liquid cartridge which is detachably mounted on the head holder, and which supplies the first liquid jetting head with a liquid which is to be jetted from the first nozzles, and a head cartridge which has a second liquid jetting head having a plurality of second nozzles, and a liquid tank which supplies the second liquid jetting head with a liquid which is to be jetted from the second nozzles. The second liquid jetting head and the liquid tank are integrated to form the head cartridge, and the head cartridge is detachably mounted on the head holder.