Provided is a spinal-column arrangement estimation-apparatus capable of estimating at least one of a Cobb angle and a rotation angle of spinal-column arrangement present inside a human body from an image representing a three-dimensional shape of a human body surface, facilitating diagnosis of scoliosis by a doctor, confirmation of a spinal-column by a determiner, etc., and reducing medical exposure by unnecessary X-ray inspection. An image acquisition unit (11) configured to acquire an image representing a three-dimensional shape of a surface of a human body, a spinal-column arrangement estimation-unit (12) configured to estimate spinal-column arrangement of the human body using accumulated data, and an angle calculation unit (13) configured to calculate at least one of a Cobb angle and a rotation angle from the estimated spinal-column arrangement are included.
