A wearable type mobile terminal device, comprising: a frame (401, 402); a glass coupled to the frame, the frame and glass being contoured so as to be wearable within a field of vision of a user; a prism extending in a lateral direction (X-axis direction) along the glass; an optical source device configured to irradiate light to the prism in a direction that is inclined with respect to the lateral direction by a prescribed angle; and an asymmetric lens disposed between the prism and the optical source device such that light irradiated by the optical source device is directed toward the prism, wherein an optical axis of an incident surface of the asymmetric lens and an optical axis of an exit surface of the asymmetric lens are oriented in different directions, wherein the prism includes: a first total-reflection portion totally reflecting light from the asymmetric lens; a second total-reflection portion totally reflecting light from the first total-reflection portion, formed parallel to the first total-reflection portion; and a mirror reflecting light passing through the first total-reflection portion and the second total-reflection portion, the mirror being inclined from one end of the first total-reflection portion in a thickness direction of the prism so as to connect the first total-reflection portion to a second total-reflection portion. a frame (401, 402); a glass coupled to the frame, the frame and glass being contoured so as to be wearable within a field of vision of a user; a prism extending in a lateral direction (X-axis direction) along the glass; an optical source device configured to irradiate light to the prism in a direction that is inclined with respect to the lateral direction by a prescribed angle; and an asymmetric lens disposed between the prism and the optical source device such that light irradiated by the optical source device is directed toward the prism, wherein an optical axis of an incident surface of the asymmetric lens and an optical axis of an exit surface of the asymmetric lens are oriented in different directions, wherein the prism includes: a first total-reflection portion totally reflecting light from the asymmetric lens; a second total-reflection portion totally reflecting light from the first total-reflection portion, formed parallel to the first total-reflection portion; and a mirror reflecting light passing through the first total-reflection portion and the second total-reflection portion, the mirror being inclined from one end of the first total-reflection portion in a thickness direction of the prism so as to connect the first total-reflection portion to a second total-reflection portion. a first total-reflection portion totally reflecting light from the asymmetric lens; a second total-reflection portion totally reflecting light from the first total-reflection portion, formed parallel to the first total-reflection portion; and a mirror reflecting light passing through the first total-reflection portion and the second total-reflection portion, the mirror being inclined from one end of the first total-reflection portion in a thickness direction of the prism so as to connect the first total-reflection portion to a second total-reflection portion.