Present invention relates to exterior facing panels for outer walls of the buildings comprising plural panels, each of the panels comprising a top face; side faces connected to said top face and bent downwardly from the edge of the top face; inward-bent end portions connected to said side faces and bent inwardly to the panel in substantially right angle with respect to said side faces, and said inward-bent end portions supporting and holding an adiabatic materials filed with the panels, engaging holes extending laterally across some parts of the side faces in a manner that the adjacent engaging holes of the adjacent side faces of the adjacent panels do not face oppositely with each other; and a clip having a claw for engaging with said engaging hole, a holding portion for engaging with said inward-bent end portion of the panel, a connecting portion for connecting the clip with a frame which are used for structurally holding and supporting the exterior facing panels, and an adiabatic plate attached to bottom of said connecting portion for preventing heat or cold from transferring between said panels and frames. Preferably, in the inward-bent exterior facing panels, size of the claw of the clip inserted into the corresponding engaging hole is smaller than that of said corresponding engaging hole.