PROBLEM TO BE SOLVED: To provide a biological information collection method and a biological information collection device for preliminarily preventing an accident such as the misidentification of patients by correctly collecting and storing the biological information of a plurality of patients.SOLUTION: Date information when a patient ID is read is acquired from an RTC(Real Time Clock) built in a biological information collection device 107, and stored in a temporary memory. Furthermore, when biological information is received from a biological information measurement device 106, date information when the biological information is measured is acquired from the RTC built in the biological information measurement device 106, and stored in the temporary memory. Then, when the biological information collection device 107 tries to read the biological information measured before the date when the patient ID is read from the biological information measurement device 106, a warning is announced in registration, and the measurement of the biological information is promoted. When the biological information at the correct date is read again, the biological information is normally registered.