A biological information detecting device includes: a first light receiving portion which receives light from a subject a second light receiving portion which receives light from the subject and a light-transmissive member which is provided at a position further on the subject side than the first light receiving portion and the second light receiving portion, through which light from the subject is transmitted. In a direction from the biological information detecting device to the subject, when a height of the light-transmissive member at a position or in a region corresponding to the first light receiving portion is set to h1 and a height of the light-transmissive member at a position or in a region corresponding to the second light receiving portion is set to h2, h1>h2 is satisfied.
