An oven cooker mounted on top of a combustion type heating device used as a heat source, the oven cooker having a combustion gas distribution chamber (100, 130) formed between double walls of a dish-shaped cooker base (6, 67, 127) and a combustion gas distribution unit (5, 65, 103, 158) that are sequentially stacked from a lower side, a cooking chamber (120, 200) formed above the combustion gas distribution chamber by stacking the combustion gas distribution unit or the cooker base with a cooking chamber cover unit (2, 23, 62, 63, 109, 115), and a combustion gas introduction port (50, 57, 68, 101) formed in a bottom center portion of the cooker base, the oven cooker being characterized by comprising: a plurality of combustion gas communication ports (9, 69, 102, 152) provided between the combustion gas distribution chamber and the cooking chamber; and a plurality of combustion gas outlet ports (10, 61, 132, 151) provided between the cooking chamber and an outside of the cooker, wherein the combustion gas communication ports (9, 69, 102, 152) and the combustion gas outlet ports (10, 61, 132, 151) are alternately arranged along a lower edge portion of the cooking chamber, the communication ports (9, 69, 102, 152) are formed in gap regions between an edge portion of the cooker base and an edge portion of the combustion gas distribution unit, the outlet ports (10, 61, 132, 151) are formed in one of contact regions between the edge portion of the cooker base and the edge portion of the combustion gas distribution unit, the edge portion of the cooker base, and a lower edge portion of the cooking chamber cover unit, and while combustion gas introduced into the combustion gas distribution chamber through the combustion gas introduction port (50, 57, 68, 101) of the cooker base flows into the cooking chamber (120, 200) through the communication ports (9, 69, 102, 152) and is discharged to the outside of the cooker after convecting in the cooking chamber, flows of the combustion gas at the communication ports (9, 69, 102, 152) do not overlap or collide with flows of the combustion gas at the outlet ports (10, 61, 132, 151). a plurality of combustion gas communication ports (9, 69, 102, 152) provided between the combustion gas distribution chamber and the cooking chamber; and a plurality of combustion gas outlet ports (10, 61, 132, 151) provided between the cooking chamber and an outside of the cooker, wherein the combustion gas communication ports (9, 69, 102, 152) and the combustion gas outlet ports (10, 61, 132, 151) are alternately arranged along a lower edge portion of the cooking chamber, the communication ports (9, 69, 102, 152) are formed in gap regions between an edge portion of the cooker base and an edge portion of the combustion gas distribution unit, the outlet ports (10, 61, 132, 151) are formed in one of contact regions between the edge portion of the cooker base and the edge portion of the combustion gas distribution unit, the edge portion of the cooker base, and a lower edge portion of the cooking chamber cover unit, and while combustion gas introduced into the combustion gas distribution chamber through the combustion gas introduction port (50, 57, 68, 101) of the cooker base flows into the cooking chamber (120, 200) through the communication ports (9, 69, 102, 152) and is discharged to the outside of the cooker after convecting in the cooking chamber, flows of the combustion gas at the communication ports (9, 69, 102, 152) do not overlap or collide with flows of the combustion gas at the outlet ports (10, 61, 132, 151).