PROBLEM TO BE SOLVED: To provide a connector device of a mold component and a laying construction method of a mold component, providing retaining of a slope and raising environment of plants such as lawn, having excellent executability of work, and improve follow-up performance to the vertical motion at a panel point part of a mold component. SOLUTION: This connector device of a mold component includes: a pair of joining plates 3, 3' provided with set grooves 2, 2' intersecting to be assembled; a bolt 4 passing through bolt penetration holes 5, 5 provided intersecting a slit on the side surface of the mold component and a nut 4A engaged with the bolt; an engagement hook 7 whose forked foot parts 7a, 7a are inserted in insertion holes 6, 6 to constrain assembling of the joining plates; and a pile body 8 driven in the slope N in a closed end 7b of the engagement hook, to which the panel point P portion of the joining plates is fitted by a fitting means 9. COPYRIGHT: (C)2008,JPO&INPIT