A beverage preparation apparatus includes a milling unit which obtains powders by grating an object to be grated, a liquid storage tank which stores a liquid, a liquid supply path having one end connected to the liquid storage tank and having the other end provided with a supply port, a powder reception portion which is provided to be movable and receives powders obtained by the milling unit, and an agitation tank which has an opening portion opening upward and mixes the powders introduced through the opening portion from the moved powder reception portion and the liquid supplied through the opening portion from the supply port. The milling unit includes an outlet port which discharges the obtained powders into the powder reception portion and the outlet port is located below the opening portion.