To provide an interior part for automobile suitable for attempting lightening, cost reduction, and stiffness enhancement, in the interior part for automobile used as a trunk floor board etc., and to provide the method for manufacturing the same.

The interior part for automobile has a structure to connect a semi-rigid urethane core layer 2 of the thermosetting property and thermoplastic resin members 3 comprising the thermoplastic resin sheet or the thermoplastic resin fiber. In the semi-rigid urethane core layer 2, the bubble cell of the layer surface has the size equal to the bubble cell in the layer, and the bubble cell of the layer surface communicates the external through the bubble cell in the layer. In the joint of the thermoplastic resin member 3 and the semi-rigid urethane core layer 2, the thermoplastic resin member 3 and the semi-rigid urethane core layer 2 are united by a portion of the thermoplastic resin member 3 entering the bubble cell of the surface of the semi-rigid urethane core layer 2.