PURPOSE: To provide a coffee maker using a vertical boiler as a heating supply means in which high temperature hot water can be smoothly stably lifted and supplied while the heating supply means is prevented from failures and undesirable sounds.

CONSTITUTION: A full automatic coffee maker is provided which comprises a means 10 for roasting coffee beans, a means 20 for cooling the beans roasted by the means 10, a bean milling means 30, a means for heating and supplying water from a water tank and an extracting means for receiving the beans milled by the bean milling means and hot water from the heating supply means to extract coffee liquid. The heating supply means is provided with a water tank 40, a small volume vertical boiler 50 placed below the water tank, a hot water pouring means 60 placed above the water tank, a feed water pipe 41 for connecting the water tank to the vertical boiler and a hot water lifting pipe 53 for connecting the vertical boiler to the hot water pouring means. A throttled part 43 is provided on the way of the feed water pipe 41.