A heating cooker comprising: a heating chamber housing an object to be heated; and a convection device (13, 14, 16, 17) that is provided behind a back wall of the heating chamber, is communicated with the heating chamber through a suction port (22a, 22c) and a discharge port (22b, 22d) provided in the back wall of the heating chamber, and generates hot air to supply the hot air to the heating chamber, the convection device (13, 14, 16, 17) having: a circulation fan which sucks air in the heating chamber from the suction port (22a, 22c) into the convection device (13, 14), and sends out the sucked air from the discharge port (22b, 22d) into the heating chamber; a convection heater which is provided in front of the circulation fan, and heats the air sucked in the convection device; a first air guide which is provided so as to surround the convection heater, and guides, to the convection heater, the air sucked in the convection device; and a second air guide provided so as to surround the circulation fan and the first air guide, and guides, to the discharge port (22b, 22d), the air heated by the convection heater, wherein a part of the second air guide is in contact with the first air guide, characterised in that another part of the second air guide is isolated from the first air guide. a heating chamber housing an object to be heated; and a convection device (13, 14, 16, 17) that is provided behind a back wall of the heating chamber, is communicated with the heating chamber through a suction port (22a, 22c) and a discharge port (22b, 22d) provided in the back wall of the heating chamber, and generates hot air to supply the hot air to the heating chamber, the convection device (13, 14, 16, 17) having: a circulation fan which sucks air in the heating chamber from the suction port (22a, 22c) into the convection device (13, 14), and sends out the sucked air from the discharge port (22b, 22d) into the heating chamber; a convection heater which is provided in front of the circulation fan, and heats the air sucked in the convection device; a first air guide which is provided so as to surround the convection heater, and guides, to the convection heater, the air sucked in the convection device; and a second air guide provided so as to surround the circulation fan and the first air guide, and guides, to the discharge port (22b, 22d), the air heated by the convection heater, wherein a part of the second air guide is in contact with the first air guide, characterised in that another part of the second air guide is isolated from the first air guide. a circulation fan which sucks air in the heating chamber from the suction port (22a, 22c) into the convection device (13, 14), and sends out the sucked air from the discharge port (22b, 22d) into the heating chamber; a convection heater which is provided in front of the circulation fan, and heats the air sucked in the convection device; a first air guide which is provided so as to surround the convection heater, and guides, to the convection heater, the air sucked in the convection device; and a second air guide provided so as to surround the circulation fan and the first air guide, and guides, to the discharge port (22b, 22d), the air heated by the convection heater, wherein a part of the second air guide is in contact with the first air guide, characterised in that another part of the second air guide is isolated from the first air guide.