To provide a mobile device which can accurately identify a location of the mobile device in relation to a user.The mobile device includes: an operation input unit (101) which receives an input of operation information entered by the user; a sensor unit (102) which detect speed information regarding the mobile device (100); a reference point rule holding unit (103) which holds reference point rules each of which indicates a relationship between the operation information and a reference point which indicates the location of the mobile device (100) at a point in time when the input of the operation information is received; a reference point determining unit (104) which determines, as an operation reference point, the reference point corresponding to the operation information received by the operation input unit (101), with reference to the reference point rules; a trajectory calculating unit (105) which calculates a movement trajectory of the mobile device (100), based on the speed information detected by the sensor unit (102); and a location identifying unit (106) which identifies a location of an end point of the movement trajectory originating at a start point that is a point corresponding to the operation reference point, using the movement trajectory calculated by the trajectory calculating unit (105).