According to one embodiment, a reinspection apparatus which reinspects rejected sheets rejected from sheet processing apparatus configured to convey sheets at first speed, to inspect conveyed sheet in accordance with first determination threshold, and to reject sheets in accordance with an inspection result, reinspection apparatus includes, conveying unit configured to convey taken sheets at second speed lower than first speed, inspection unit configured to inspect sheets conveyed at second speed, determination unit configured to determine whether to reject sheets, and counting unit configured to count sheets which have been determined not to be rejected.