A heating cooker, comprising: a box-like body; a top board that is provided to close the opening of the body; a heating unit that is provided inside the body and that heats a heating target cooking vessel placed on the top board; and a light emitting indicator unit that is provided beside the heating unit, wherein the light emitting indicator unit includes: a case that has an opening at a top portion of the case facing the top board; a light emission source that is provided in the case; characterized in that the box-like body having an opening at a top portion of the box; further including an indicator sheet that is provided to close the opening of the case, wherein the indicator sheet has: a light transmitting portion that passes light of the light emission source; and a light blocking portion that is provided at a position further away from the heating unit than from the light transmitting portion, the light blocking portion blocking the light of the light emission source, wherein the heating unit has an outer circumferential portion formed to be substantially circular, the case has a bottom wall in a substantially isosceles triangular shape, the case being disposed such that a base side of the substantially isosceles triangular shape faces the outer circumferential portion of the heating unit, the light emission source is disposed below the light blocking portion, and is disposed near an apex being away from the base of the bottom wall of the case, and the base of the bottom wall of the case is formed to be arc-shaped so as to conform to the outer circumferential portion of the heating unit. a box-like body; a top board that is provided to close the opening of the body; a heating unit that is provided inside the body and that heats a heating target cooking vessel placed on the top board; and a light emitting indicator unit that is provided beside the heating unit, wherein the light emitting indicator unit includes: a case that has an opening at a top portion of the case facing the top board; a light emission source that is provided in the case; characterized in that the box-like body having an opening at a top portion of the box; further including an indicator sheet that is provided to close the opening of the case, wherein the indicator sheet has: a light transmitting portion that passes light of the light emission source; and a light blocking portion that is provided at a position further away from the heating unit than from the light transmitting portion, the light blocking portion blocking the light of the light emission source, wherein the heating unit has an outer circumferential portion formed to be substantially circular, the case has a bottom wall in a substantially isosceles triangular shape, the case being disposed such that a base side of the substantially isosceles triangular shape faces the outer circumferential portion of the heating unit, the light emission source is disposed below the light blocking portion, and is disposed near an apex being away from the base of the bottom wall of the case, and the base of the bottom wall of the case is formed to be arc-shaped so as to conform to the outer circumferential portion of the heating unit. a case that has an opening at a top portion of the case facing the top board; a light emission source that is provided in the case; characterized in that the box-like body having an opening at a top portion of the box; further including an indicator sheet that is provided to close the opening of the case, wherein the indicator sheet has: a light transmitting portion that passes light of the light emission source; and a light blocking portion that is provided at a position further away from the heating unit than from the light transmitting portion, the light blocking portion blocking the light of the light emission source, wherein the heating unit has an outer circumferential portion formed to be substantially circular, the case has a bottom wall in a substantially isosceles triangular shape, the case being disposed such that a base side of the substantially isosceles triangular shape faces the outer circumferential portion of the heating unit, the light emission source is disposed below the light blocking portion, and is disposed near an apex being away from the base of the bottom wall of the case, and the base of the bottom wall of the case is formed to be arc-shaped so as to conform to the outer circumferential portion of the heating unit. a light transmitting portion that passes light of the light emission source; and a light blocking portion that is provided at a position further away from the heating unit than from the light transmitting portion, the light blocking portion blocking the light of the light emission source, wherein the heating unit has an outer circumferential portion formed to be substantially circular, the case has a bottom wall in a substantially isosceles triangular shape, the case being disposed such that a base side of the substantially isosceles triangular shape faces the outer circumferential portion of the heating unit, the light emission source is disposed below the light blocking portion, and is disposed near an apex being away from the base of the bottom wall of the case, and the base of the bottom wall of the case is formed to be arc-shaped so as to conform to the outer circumferential portion of the heating unit.