The 3D surface scanning system has been applied in the 3D printing manufacturing technique to create a three-dimensional object. In the development of 3D scanning system have focused in rehabilitation field for prototype realization purposes of wrist orthopedic cast design such as brace wristband. This paper presents the design of a low cost 3D scanner to scan the surface contour of the object. 3D scanner is designed with a line laser and cameras to scan the skin surface of the human wrist. The laser line is used to form the laser line projected image on the surface of the object that contains the intersection curve. The camera is used to detect the shape of the projected 2D curve and sending data from the surface of the object to a computer that will be converted into a 3D reference point. The conversion result represents a reference point associated with the segment line curves. In the experiment, the reference point used for 3D reconstruction of the surface of the object using Octave 4.2.1. The performance of the system is tested and compared using explicit calibration. The result shows the scanning system can be implemented to scan and reconstruct the object surface contours.