PURPOSE: To three-dimensionally recognize the positions of recognized parts such as flat package IC and the like.

CONSTITUTION: A screen 10 on which the recognized parts are loaded and which has transmissivity and an lighting means 11 which is installed on the loading side of the recognized parts against the screen 10 are provided. Furthermore, an image pickup means 5 arranged on the opposite side of the loading side of the recognized parts against the screen and a recognition processing means 12 recognizing the three-dimensional positions of the recognized parts against the screen by the density level of a screen image which is image picked up by the image-pickup device are provided.