A portable X-ray imaging apparatus is prevented from losing a connection with a medical member when a detection element is set up in the proximity of the subject to carry out an X-ray imaging. The portable X-ray imaging apparatus 100 comprises an X-ray tube device 4 that irradiates an X-ray to a subject P, an X-ray receiver 6 that detects the X-ray that transmits the subject P, a housing 1b that houses the X-ray receiver 6 capable of being pulled out, and a control element 21 that provides an alarm to prompt paying attention based on the connecting information 30a relative to a connection of the medical member with the subject
