The present invention provides a device and a method for reconstructing a medical image and a computer-readable recording medium for recording a program for executing the method. According to the present invention, without additionally capturing a two-dimensional medical image but by using pre-captured three-dimensional medical image information, a corresponding image is properly positioned in a three-dimensional space, errors, generated due to inaccurate posture of a patient when images are being captured, are corrected and then a two-dimensional medical image is generated by means of an automatic reconstruction method. To this end, the present invention comprises: a geometry correction unit for correcting the geometry of a three-dimensional medical image information such that a three-dimensional medical image is properly positioned in a three-dimensional space； a setting unit for setting an image information utilization section for the three-dimensional medical image information； and a reconstructing unit for reconstructing a two-dimensional medical image by means of summation in the two-dimensional viewing direction the three-dimensional medical image information of the image information utilization section.
