A human body sensing device being mounted on an object comprises: a first and second sensor being mounted on a vertical plane of the object and each having a pair of a positive and negative electrode; and a lens covering over the first and second sensors, wherein: the lens forms a sensing block in a sensing area constituting a plane perpendicular to the vertical plane, the sensing block including the positive and negative electrodes of the first sensor, and the positive and negative electrodes of the second sensor; either a first virtual line or an extended part thereof and either a second virtual line or an extended part thereof have a point of intersection in the sensing area; and the first and second virtual lines are symmetric with respect to a line perpendicular to the vertical plane of the object and passing through the point of intersection.