A tablet splitting apparatus comprising: a holding mechanism capable of holding a tablet to be split at a cutting position; a cutting mechanism capable of cutting the tablet held at the cutting position; and a cutting operation regulating section for regulating operating steps of the cutting mechanism and the holding mechanism, wherein: a structure of the cutting mechanism and the operating steps of the cutting mechanism and the holding mechanism regulated by the cutting operation regulating section are determined such that fluctuations in weight of a plurality of split tablet pieces obtained by splitting the tablet are small, characterized in that: the cutting mechanism includes a pair of opposed blades (41, 42) each displaceable between a movement stand-by position and a movement completion position, and is configured to cut the tablet located at the cutting position by displacing both of the opposed blades in the pair from the movement stand-by position to the movement completion position; and the cutting operation regulating section regulates the operating steps such that when both of the opposed blades in the pair are displaced from the movement stand-by position to the movement completion position, the holding mechanism continuously holds the tablet until the tablet is caught between the pair of opposed blades, and after the tablet has been caught between the pair of opposed blades, the holding mechanism releases the tablet and only the pair of opposed blades hold the tablet to cut into the tablet after the holding mechanism releases the tablet. a holding mechanism capable of holding a tablet to be split at a cutting position; a cutting mechanism capable of cutting the tablet held at the cutting position; and a cutting operation regulating section for regulating operating steps of the cutting mechanism and the holding mechanism, wherein: a structure of the cutting mechanism and the operating steps of the cutting mechanism and the holding mechanism regulated by the cutting operation regulating section are determined such that fluctuations in weight of a plurality of split tablet pieces obtained by splitting the tablet are small, characterized in that: the cutting mechanism includes a pair of opposed blades (41, 42) each displaceable between a movement stand-by position and a movement completion position, and is configured to cut the tablet located at the cutting position by displacing both of the opposed blades in the pair from the movement stand-by position to the movement completion position; and the cutting operation regulating section regulates the operating steps such that when both of the opposed blades in the pair are displaced from the movement stand-by position to the movement completion position, the holding mechanism continuously holds the tablet until the tablet is caught between the pair of opposed blades, and after the tablet has been caught between the pair of opposed blades, the holding mechanism releases the tablet and only the pair of opposed blades hold the tablet to cut into the tablet after the holding mechanism releases the tablet. the cutting mechanism includes a pair of opposed blades (41, 42) each displaceable between a movement stand-by position and a movement completion position, and is configured to cut the tablet located at the cutting position by displacing both of the opposed blades in the pair from the movement stand-by position to the movement completion position; and the cutting operation regulating section regulates the operating steps such that when both of the opposed blades in the pair are displaced from the movement stand-by position to the movement completion position, the holding mechanism continuously holds the tablet until the tablet is caught between the pair of opposed blades, and after the tablet has been caught between the pair of opposed blades, the holding mechanism releases the tablet and only the pair of opposed blades hold the tablet to cut into the tablet after the holding mechanism releases the tablet.