To provide a building construction panel combination body and execution method thereof capable of conducting an execution of the construction without necessitating independent pillars and beams.

The building construction panel combination body includes outer frames 8, 8a, 8b, and comprises a vertical wall construction panel VP for constructing vertical walls such as outer walls and partition walls of a building comprising a metallic frame three-dimensional body 5 having a rigid area mechanism in the outer frame and a horizontal wall construction panel HP for constructing horizontal wall comprising a metallic frame three- dimensional body having outer frames. herein, a part of the vertical wall construction panel constitutes pillars of the construction, and a part of the horizontal wall construction panel constitutes beams of the construction; then a connection unit 4 is provided for making each connection between the vertical wall construction panel VP and the horizontal wall construction panel HP.