An inhaler according to the present invention includes the following so that a user can visually confirm the ejection status of medicine: an air flow path communicating with a suction port through which a user inhales medicine; a medicine ejection portion ejecting the medicine supplied to the air flow path; an image sensor picking up the inside of the air flow path; a memory storing image data being the output of the image sensor; writing means storing the image data in the memory; and reading means reading the image data stored in the memory: wherein, the writing means is operated in synchronization with the timing of ejecting the medicine or after passing a predetermined time from ejecting the medicine.