To provide a slab supporting structure capable of suppressing a lateral buckling even when a steel beam is attached to only one side of a floor slab.SOLUTION: A slab support structure for supporting a floor slab by means of a steel beam comprises: a first steel beam extending in a first direction and supporting the floor slab; a second steel beam extending in a second direction intersecting the first direction and supporting the floor slab; a plurality of first studs provided at appropriate intervals in the first direction at an upper part of the first steel beam; a plurality of second studs provided at appropriate intervals in the second direction at an upper part of the second steel beam; and a reinforcing bar which has a first part engaged with the first stud, a second part engaged with the second stud, and a third part extending between the first part and the second part, and which is embedded in the floor slab together with the first stud and the second stud.SELECTED DRAWING: Figure 2
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