A gas burner apparatus comprising: a first burner to receive supplied gas mixed with a first primary air from a first primary air supply flow path (P) and to inject flames (F1) through a plurality of first burner ports formed along an edge of the first burner ; a second burner , spaced apart from a lower side of the first burner and including an upper side , to receive the supplied gas mixed with a second primary air from a second primary air supply flow path and to inject flames (F2) through a plurality of second burner ports formed along an edge of the second burner ; a support plate spaced apart from a lower side of the second burner ; and a secondary air supply flow channel (S1, S3, S4) to supply secondary air to the first burner , wherein the secondary air supply flow channel (S1, S3, S4) comprises: a first secondary air supply flow path (S1) formed between the first and second burners; a third secondary air supply flow path (S3) formed inside the second burner and connected to the first secondary air supply path (S1); and a fourth secondary air supply flow path (S4) formed between the second burner and the support plate and connected to the third secondary air supply path (S3); characterized in that , the secondary air supply flow channel (S1, S3, S4) further comprises a second secondary air supply flow path (S2) starting from an area lower than the support plate and connect to the first secondary air supply flow path (S1). a first burner to receive supplied gas mixed with a first primary air from a first primary air supply flow path (P) and to inject flames (F1) through a plurality of first burner ports formed along an edge of the first burner ; a second burner , spaced apart from a lower side of the first burner and including an upper side , to receive the supplied gas mixed with a second primary air from a second primary air supply flow path and to inject flames (F2) through a plurality of second burner ports formed along an edge of the second burner ; a support plate spaced apart from a lower side of the second burner ; and a secondary air supply flow channel (S1, S3, S4) to supply secondary air to the first burner , wherein the secondary air supply flow channel (S1, S3, S4) comprises: a first secondary air supply flow path (S1) formed between the first and second burners; a third secondary air supply flow path (S3) formed inside the second burner and connected to the first secondary air supply path (S1); and a fourth secondary air supply flow path (S4) formed between the second burner and the support plate and connected to the third secondary air supply path (S3); characterized in that , the secondary air supply flow channel (S1, S3, S4) further comprises a second secondary air supply flow path (S2) starting from an area lower than the support plate and connect to the first secondary air supply flow path (S1). a first secondary air supply flow path (S1) formed between the first and second burners; a third secondary air supply flow path (S3) formed inside the second burner and connected to the first secondary air supply path (S1); and a fourth secondary air supply flow path (S4) formed between the second burner and the support plate and connected to the third secondary air supply path (S3); characterized in that , the secondary air supply flow channel (S1, S3, S4) further comprises a second secondary air supply flow path (S2) starting from an area lower than the support plate and connect to the first secondary air supply flow path (S1). <EOS>