An eye contact detection device comprising: a light emitting means for emitting light (la) from a specific area; a light receiving means for receiving reflected light (lb) of the light (la) emitted by the light emitting means to output an electrical signal according to the received light; and a determination means for determining the presence or absence of eye contact of a user (U) based on the electrical signal corresponding to the light from the light emitting means ; wherein the determination means determines the presence or absence of eye contact based on reflected light (lb), that is passed through the cornea, the iris, and the crystalline lens of the eyeball (E), arrived at the retina of the eyeball (E), reflected off at the retina, passed through the crystalline lens, the iris, and the cornea, and emitted out of the eyeball (E), the reflected light (lb) is caused by red-eye effect in which a light beam emitted from the specific area is reflected at the eye ground of the user's eye when the user's gaze direction is directed to the specific area, characterized in that the light receiving means includes two light receiving elements which are placed in symmetry with respect to the optical axis (O) of the light emitting means , wherein the determination means uses a relationship between a difference of angle of the user's gaze direction (α1, α2) and the optical axis (O) of the light emitting means and the amount of light received by the light receiving means , wherein the determination means calculates two gaze directions (α1, α2) corresponding to the two light receiving elements based on the electrical signal received by the two light receiving elements in reference to the relationship, and wherein the determination means determines the presence of eye contact when the difference of the two gaze directions (α1, α2) is less than a certain value. a light emitting means for emitting light (la) from a specific area; a light receiving means for receiving reflected light (lb) of the light (la) emitted by the light emitting means to output an electrical signal according to the received light; and a determination means for determining the presence or absence of eye contact of a user (U) based on the electrical signal corresponding to the light from the light emitting means ; wherein the determination means determines the presence or absence of eye contact based on reflected light (lb), that is passed through the cornea, the iris, and the crystalline lens of the eyeball (E), arrived at the retina of the eyeball (E), reflected off at the retina, passed through the crystalline lens, the iris, and the cornea, and emitted out of the eyeball (E), the reflected light (lb) is caused by red-eye effect in which a light beam emitted from the specific area is reflected at the eye ground of the user's eye when the user's gaze direction is directed to the specific area, characterized in that the light receiving means includes two light receiving elements which are placed in symmetry with respect to the optical axis (O) of the light emitting means , wherein the determination means uses a relationship between a difference of angle of the user's gaze direction (α1, α2) and the optical axis (O) of the light emitting means and the amount of light received by the light receiving means , wherein the determination means calculates two gaze directions (α1, α2) corresponding to the two light receiving elements based on the electrical signal received by the two light receiving elements in reference to the relationship, and wherein the determination means determines the presence of eye contact when the difference of the two gaze directions (α1, α2) is less than a certain value. <EOS>