To provide a furniture of a unit system, which enables to assemble also a furniture with drop lids or inside partitions.

This furniture can be assembled as a modularized system and is equipped with a framework, carrying member plates 5 mountable to openings of the framework by corner-catch parts 6 and foundation structure parts. The corner-catch parts 6 are fixed detachably to the carrying member parts 5. The parts 6 are accessible from the side of the same and are extended parallel with the face of the plates. Each of the parts 6 has at least one housing part for arresting pins 16 to mount the parts 6 to the framework and a securing tool 22 to secure the pin 16.