Liquid sample measurement device with removable lancet or biosensor

A liquid sample measurement device to which a biosensor may be removably attached, the biosensor having a blood sample deposited on it created by a puncturing of a skin, the liquid sample measurement device comprising:

• a sensor port to which the biosensor is removably attached;
• a measuring sensor configured to measure an amount of a substance in the blood sample and produce a first measurement by applying a voltage or a current to electrodes of the biosensor;
• and
• a display section configured to display the first measurement of the measuring sensor;
• a sensor wearing detecting section configured to detect whether or not the biosensor is attached to the liquid sample measurement device and transmit a result of the detection;
• and
• a controller configured to control the measuring sensor,
• the controller receives the result of the detection from the sensor wearing detecting section after the measuring sensor measures the blood sample and produces the first measurement, and makes the display section display instructing removing the biosensor continuously and prohibits from proceeding to a next step unless a user removes the biosensor from the liquid sample measurement device.