A manufacturing method of a honeycomb formed body includes a forming step of extruding a coupled forming raw material billet from a honeycomb body forming die to obtain a honeycomb-shaped formed product, the coupled forming raw material billet having a colorant applied on at least one of coupling surfaces between each forming raw material billets to be coupled; a cutting step of cutting the formed product to obtain a plurality of honeycomb formed bodies; and a separating step of separating the plurality of honeycomb formed bodies into a colorant-containing honeycomb formed bodies and a colorant non-containing honeycomb formed bodies.