The present disclosure provides a novel technical means for simply and efficiently manufacturing filling-packed processed food products. More specifically, the present disclosure provides a method for manufacturing a filling-packed processed food product, the method including: a step for preparing a recessed member having as a main component livestock meat or marine product-derived meat; a step for obtaining filling-packed recessed member by packing the recess of the recessed member with a filling member; a step for obtaining a lidded filling-packed recessed member by disposing a lid member having as a main component livestock meat or marine product-derived meat on an opening surface in the filling-packed recessed member; and a step for heating the lidded filling-packed recessed member.