To provide a methane hydrate production device which can efficiently produce methane hydrate and stably store methane hydrate.

This methane hydrate production device for bringing natural gas into contact with water under a prescribed high pressure to produce methane hydrate comprises a pressure-resistant container 1 capable of resisting to the prescribed high pressure, a porous plate 7 for dividing the inner space of the pressure-resistance container 1 into upper and lower spaces 2, 8, a scraper device 6 disposed in the upper space 2, cooling medium evaporators 5 disposed on the outer peripheral surface of the upper space 2 at two or more stages, a freezer 12 for supplying the cooling medium to the cooling medium evaporators 5, a means 18 for supplying the raw material water to the bottom portion of the upper space 2, and a means 14 for supplying the natural gas to the lower space 8.