A biological information detection apparatus includes a case, a detection part that houses a light receiving portion that receives light from a test subject and protrudes outer than a case outer surface of the case on the test subject side, and a first convex portion and a second convex portion provided with the detection part in between in a plan view of the test subject side of the case. There is at least a region in which the first convex portion and the second convex portion are not joined from the detection part side over the outer edge side of the case in the plan view.
