An inspection device 1 includes an inspection table 2 on which an inspection target T which is a set of a plurality of solid drugs O is placed, a vibration unit 3 that vibrates the inspection table 2, an imaging unit 4 that acquires an image of the inspection target T, which is placed on the inspection table 2, in a first direction along the inspection table 2, and a control unit 5 that determines whether the solid drugs O in the inspection target T overlap each other, based on inspection target information including appearance information of each of the drugs forming the inspection target T and the image of the inspection target T in the first direction, and operates the vibration unit 3 in a case in which it is determined that the solid drugs O overlap each other.
