The device permits setting of a high flow rate mode in which a solution is fed at a higher flow rate than in a normal usage flow rate zone in which there is no possibility that drops dripping down within a drip tube (100) will coalesce. In the case that the normal usage flow rate zone is selected, the setting is such that multiple drops drip down from the drip tube (100) in a single cycle of solution feed, and in the case in which the high flow rate mode has been set, the setting is such that drops dripping down from the drip tube (100) are deliberately induced to coalesce, and a single drop drips down from the drip tube (100) in a single cycle of solution feed without fail. Even during the high speed mode produced by this setting, it is possible to ensure accurate flow rate determination on the basis of the output of a drip sensor (8), and transfusion at a high flow rate is possible.
