An induction heating cooking device comprising: a top plate (22, 41, 52) on which an object to be heated is placeable; a box shaped framework (21, 40, 50, 80) which has an opening portion (21i, 40i, 50f) of an approximately rectangular shape opposite to, a bottom surface (21a, 40a, 50a, 80a) and side surfaces, wherein the opening portion is covered by the top plate (22, 41, 52); and a heating coil unit (25, 75) which is provided inside the framework (21, 40, 50, 80), and which has a heating coil that, in use, induction heats the object to be heated and a heating coil supporting member (33, 73, 91) that supports the heating coil; wherein at least a set of opposite side surfaces of the framework (21, 40, 50, 80) have a stepped structure with first vertical parts (21b, 40b, 50ba, 50bb, 80b) that project from outer edge parts of the bottom surface (21a, 40a, 50a, 80a) towards the opening portion; first horizontal parts (21c, 40c, 50ca, 50cb, 80c) that project from upper edge parts of the first vertical parts (21b, 40b, 50ba, 50bb, 80b) horizontally outwards; second vertical parts (21d, 40d, 50da, 50db, 80d) that project from outer edge parts of the first horizontal parts (21c, 40c, 50ca, 50cb, 80c) which form the opening portion (21i, 40i, 50f) with their upper edge parts; the heating coil unit (25, 75) being configured to be supported by the first horizontal parts (21c, 40c, 50ca, 50cb, 80c), characterised in that said framework (21, 40, 50, 80) further comprises second horizontal parts (21e, 40e, 50ea, 50eb, 80e) that project to an outer side or an inner side from the upper edge parts of the second vertical parts (21d, 40d, 50da, 50db, 80d), and the upper surfaces of the second horizontal parts (21e, 40e, 50ea, 50eb, 80e) are configured to be in contact with the top plate (22, 41, 52). a top plate (22, 41, 52) on which an object to be heated is placeable; a box shaped framework (21, 40, 50, 80) which has an opening portion (21i, 40i, 50f) of an approximately rectangular shape opposite to, a bottom surface (21a, 40a, 50a, 80a) and side surfaces, wherein the opening portion is covered by the top plate (22, 41, 52); and a heating coil unit (25, 75) which is provided inside the framework (21, 40, 50, 80), and which has a heating coil that, in use, induction heats the object to be heated and a heating coil supporting member (33, 73, 91) that supports the heating coil; wherein at least a set of opposite side surfaces of the framework (21, 40, 50, 80) have a stepped structure with first vertical parts (21b, 40b, 50ba, 50bb, 80b) that project from outer edge parts of the bottom surface (21a, 40a, 50a, 80a) towards the opening portion; first horizontal parts (21c, 40c, 50ca, 50cb, 80c) that project from upper edge parts of the first vertical parts (21b, 40b, 50ba, 50bb, 80b) horizontally outwards; second vertical parts (21d, 40d, 50da, 50db, 80d) that project from outer edge parts of the first horizontal parts (21c, 40c, 50ca, 50cb, 80c) which form the opening portion (21i, 40i, 50f) with their upper edge parts; the heating coil unit (25, 75) being configured to be supported by the first horizontal parts (21c, 40c, 50ca, 50cb, 80c), characterised in that said framework (21, 40, 50, 80) further comprises second horizontal parts (21e, 40e, 50ea, 50eb, 80e) that project to an outer side or an inner side from the upper edge parts of the second vertical parts (21d, 40d, 50da, 50db, 80d), and the upper surfaces of the second horizontal parts (21e, 40e, 50ea, 50eb, 80e) are configured to be in contact with the top plate (22, 41, 52).