PURPOSE: To provide an article-holder detent panel being light in weight but high in rigidity.

CONSTITUTION: In a detent piece 5 composed of a first wall 6 joining with a panel 4 and intersecting to the surface of the panel 4 and of a second wall 7 joining with the first wall 6 and intersecting to the first wall 6, ribs 8 are formed in bent parts existing in the joining place of the first wall 6 and panel 4 in the detent piece 5 and in bent parts existing in the joining place of the first wall 6 and second wall 7 in the detent piece 5 in the manner of swelling out along the direction intersecting to the bending lines of the bent parts.