Living body information detection apparatus and sphygmomanometer

A living body information collecting apparatus having a shape suitable for attachment to human ear canal, the living body information collecting apparatus is provided with a sensing part for collecting living body information from the external auditory canal. Also, opposite to the first arm and the second arm and the frame portion and the side or the second of the first arm of the arm opposite to the second arm of the first arm with the opposite sphygmomanometer having a pressure applying part provided in at least one place of the side, and a detection part for detecting a pulse wave is provided.