Water outlet device, faucet and shower head

A water outlet device, comprising:

• a jet disk and a cover body, wherein the jet disk comprises a disk body, the disk body has a first disk surface and a second disk surface that are opposite to each other, and the jet disk further comprises a nozzle part provided on the disk body and extending out of the second disk surface, wherein the nozzle part comprises a sidewall and a bottom wall enclosing a hollow cavity, and the bottom wall of the nozzle part is provided with a water outlet hole;
• wherein the cover body comprises a cover plate which is installed cooperatively with the disk body to form a water inlet channel, the cover plate has a first plate surface and a second plate surface that are opposite to each other, the cover body further comprises an extension part extending from the second plate surface toward the first disk surface and extending into the hollow cavity, a water jet channel is formed by an outer wall surface of the extension part and an inner wall surface of a sidewall of the nozzle part, and a water outlet end of the water jet channel communicates with the water outlet hole.