To automatically lock the raised state of a supporting leg by raising the supporting leg in a table having a foldable supporting leg in the top.

A supporting leg 4 is raisably provided to the underside of a top 1 and a supporting leg holding member 5 is provided rotatably by a supporting shaft 7. A guide hole 8 and an engagement pin 6 an engagement hole 8a bent from the hole 8 are provided in the supporting leg holding member 5. The supporting leg 4 is provided with a guide hole 8 sliding in the engagement hole 8a. The supporting leg holding member 5 is provided with a spring material 10. When the supporting leg 4 is raised from the laid state. The engagement pin 6 slides in the guide hole 8, guided to the engagement hole 8a by a spring material 10, and when the engagement pin 6 is fitted into the engagement hole 8a, the spring material 10 holds the fitted state by an elastic force and locks.