A medical apparatus of the present invention comprises: a storing section in which information concerning a drug kinetics in a living body is stored in advance for each of plural kinds of fluorescent drugs an arithmetic processing section that acquires diagnosis start time corresponding to a desired fluorescent drug based on information stored in the storing section, information concerning a target region of an object to be examined to which the desired fluorescent drug is administered, information concerning a method of administering the desired fluorescent drug to the target region, and information concerning administration start time of the desired fluorescent drug and a light source control section that performs control to stop radiation of excitation light for exciting the desired fluorescent drug in at least a time period from the administration start time until the diagnosis start time is reached and performs control to radiate the excitation light based on the diagnosis start time.
