A method for producing a food shaped as a continuous bar by placing a continuous inner material on a continuous strip of an outer layer material that is transferred on a former belt, comprising the steps of placing food material that includes the inner material placed on the strip of the outer layer material in a channel space defined by the former belt while it is running; and shaping part of the former belt that is located at the channel space as a sleeve by pushing and joining edges of the former belt by a pushing device to allow edges of the outer layer material to be joined.