To effect the bonding treatment of a joining part skin material with a simple work without spoiling the appearance of a product and prevent the separation of terminal end of the joining part skin material, in an interior member for vehicles, employing a composite skin material wherein the joining part skin material is mounted on a general part skin material, and the manufacturing method of the same.

Needle holes 33 are bored along a place, corresponding to the groove 11 for joining of a general part skin material 31, with a proper interval while molten resin M is made to flow out to the rear surface side of terminal end 34 of a joining part skin material 32 through the needle holes 33 to form anchor units 35 upon molding the resin core material 20 through a mold press. The terminal end part 34 of the joining part skin material 32 can be retained surely in the groove 11 for joining through the anchor units 35 whereby workability in the spreading and thermal curing works of adhesive agent can be improved and the separation of the terminal end 34 of the joining part can be prevented.