A medical diagnostic imaging apparatus according to an embodiment comprises: a bed device on which an examinee lies down； a gantry having a tunnel-shaped inner portion into which the bed device moves and inserts a table with which the examinee is in direct contact, and being configured to obtain information on an interior of the examinee by imaging the examinee located in the inner portion； and a control device configured to control drive of the bed device and the gantry. The medical diagnostic imaging apparatus further comprises a multi-degree-of-freedom support mechanism mounted at a position facing the bed device with the gantry interposed in between and configured to support the table based on a control by the control device in accordance with movement of the table.
