A method for forming a food product into a circular shape, wherein both ends of an elongated food product are connected each other and closed, or into a C-shape, wherein both ends of the elongated food product face each other and opened. The method includes (a) fixing one end of the elongated food product to a rotatable core member, (b) pressing the food product toward the core member by moving the core member close to and away from a pressing roller, when the food product is formed into a circular shape by being wound around the core member by rotating the core member, and (c) separating the formed food product and the core member by releasing the food product from the core member, after forming the food product 3 into a required shape by being wound around the core member.