A top burner comprising: a first burner provided with a plurality of flame holes that form flame by combusting mixed gas, wherein the first burner is realized as an outer burner for installing on a top surface of a top plate and provided at an edge thereof with the plurality of flame holes; and a second burner provided with a plurality of flame holes that form flame separated from the flame formed by the flame holes of the first burner by combusting the mixed gas, wherein the second burner is realized as an inner burner installed on a top surface of the outer burner and provided at an edge located at an inside of the edge of the outer burner, wherein the outer burner is formed in a polyhedron shape having an oval or rectangular cross-section and the inner burner is formed in a polyhedron shape having a circular cross-section; wherein the outer burner is provided with an inner burner seating portion on which the inner burner is installed; wherein an arrangement of the flame holes of the outer burner is realized in a different shape from an arrangement of the flame holes of the inner burner in that a distance between one of the flame holes of the inner burner and one of the flame holes of the outer burner, which is closest to the one of the flame holes of the inner burner is different from a distance between another one of the flame holes of the inner burner and another one of the flame holes of the outer burner which is closest to the another one of the flame holes of the inner burner, wherein a plurality of flame hole forming teeth is provided on an edge of the top of a burner head of the outer burner except for an edge surface of the burner head of the outer burner that forms the inner burner seating portion, wherein these flame hole forming teeth are for forming the flame holes of the outer burner; wherein a plurality of flame hole forming teeth is provided at an edge of the top of a burner head of the inner burner, wherein these flame hole forming teeth are for forming the flame holes of the inner burner, wherein an inner burner cap is provided on the top surface of the burner head of the inner burner, wherein the flame holes of the inner burner are formed between an inner circumference of an undersurface of the inner burner cap and the flame hole forming teeth of the inner burner head wherein the outer burner further comprises an ignition portion formed on a side of the burner head where an end portion of an ignition plug is disposed, and wherein the mixed gases of the outer burner and the inner burner are simultaneously ignited by spark generated by the ignition plug. a first burner provided with a plurality of flame holes that form flame by combusting mixed gas, wherein the first burner is realized as an outer burner for installing on a top surface of a top plate and provided at an edge thereof with the plurality of flame holes; and a second burner provided with a plurality of flame holes that form flame separated from the flame formed by the flame holes of the first burner by combusting the mixed gas, wherein the second burner is realized as an inner burner installed on a top surface of the outer burner and provided at an edge located at an inside of the edge of the outer burner,