A mobile terminal comprising: a flexible display that is deformable into a roll shape; a storage unit configured to store the flexible display in a roll shape by applying a force in a direction in which the flexible display remains wound with a mainspring; the flexible display being in a contracted state in which the flexible display is stored in the storage unit, an expanded state in which the flexible display is drawn out from the storage unit by a user, or a maximally expanded state in which the flexible display is maximally drawn out by a user; a rotation angle sensor configured to detect absolute angles of rotation at a predetermined sampling rate corresponding to a sensor value according to a drawing out amount from a contracted state of the flexible display; and a display control means configured to control a display size of display information to be displayed on the flexible display on the basis of the sensor value detected by the rotation angle sensor and to set a reference value to zero when the flexible display is in the contracted state; wherein the display control means is further configured, when the sensor value detected by the rotation angle sensor is outside of a range defined as a +/- threshold value around the reference value, to change the display size and to update the reference value by adding a predetermined update value to the reference value when the sensor value increases from the reference value beyond the threshold value or by subtracting the predetermined update value from the reference value when the sensor value decreases from the reference value beyond the threshold value, the predetermined updating value being preferably equal to said threshold value; the display control means therewith being configured to not change the display size and not update the reference value when said sensor value is within the range. a flexible display that is deformable into a roll shape; a storage unit configured to store the flexible display in a roll shape by applying a force in a direction in which the flexible display remains wound with a mainspring; the flexible display being in a contracted state in which the flexible display is stored in the storage unit, an expanded state in which the flexible display is drawn out from the storage unit by a user, or a maximally expanded state in which the flexible display is maximally drawn out by a user; a rotation angle sensor configured to detect absolute angles of rotation at a predetermined sampling rate corresponding to a sensor value according to a drawing out amount from a contracted state of the flexible display; and a display control means configured to control a display size of display information to be displayed on the flexible display on the basis of the sensor value detected by the rotation angle sensor and to set a reference value to zero when the flexible display is in the contracted state; wherein the display control means is further configured, when the sensor value detected by the rotation angle sensor is outside of a range defined as a +/- threshold value around the reference value, to change the display size and to update the reference value by adding a predetermined update value to the reference value when the sensor value increases from the reference value beyond the threshold value or by subtracting the predetermined update value from the reference value when the sensor value decreases from the reference value beyond the threshold value, the predetermined updating value being preferably equal to said threshold value; the display control means therewith being configured to not change the display size and not update the reference value when said sensor value is within the range.