A medical liquid administration device includes a flowing portion including a flow path through which a medical liquid is to flow； a medical liquid storage communicating with the flowing portion, the medical liquid storage storing the medical liquid that is to be fed to the flowing portion； a drive mechanism comprising a motor configured to generate a driving force for feeding the medical liquid stored in the medical liquid storage to the flow path； a detection unit configured to detect whether an operating state of the drive mechanism is within in preset range； and a controller configured to determine blockage in the flowing portion and failure in the drive mechanism.
