A portable electronic device (biological information measurement device) is attachable to or detachable from a cradle and includes a USB terminal portion connected to a terminal provided in the cradle, an initial start-up unit that initially starts up the biological information measurement device, a connection determination unit that determines whether the connection has been released after the USB terminal portion has been connected to a terminal portion of the cradle, and a resetting unit that causes the initial start-up unit to initially start up the biological information measurement device when it is determined by the connection determination unit that the connection has been released after the cradle has been connected to the USB terminal portion.
