A mobile device including a biosensor for obtaining biological signals is provided in which biological information can be obtained stably while the mobile device is being held with a hand and is used, without providing a sensor specially used for detecting body motion generated by operating the mobile device.A smartphone (1) includes a biosensor (10) (biological sensing unit (11)) for obtaining a biological signal from a hand holding the mobile device, a touch panel (22) for detecting a touch operation performed by using a hand, an operation signal processor (32) for specifying a timing of a touch operation, a noise occurrence determining unit (15) for making a noise occurrence determination whether or not a peak of a biological signal is body motion noise, on the basis of whether or not the peak has been generated within a predetermined period including the specified timing, and a biological information calculator (16) for calculating biological information on the basis of an obtained biological signal and determination results.
