In an electronic sphygmomanometer, a protruding member (505) is provided in an outside surface of a first air port connection head (501), and when a first air port (327) is pushed into the first air port connection head (501), the protruding member (505) passes over a first shielding plate (323) while elastically deforming and reaches a position on the inner side of the first shielding plate (323). As a result, the first air port connection head (501) is prevented from pulling out from the first air port (327), and a sense of the protruding member (505) locking in upon returning to its original form is imparted on a worker. It is therefore possible to provide an electronic sphygmomanometer that includes, as a structure in which a pressure sensor used in the electronic sphygmomanometer is disposed, a peripheral structure for the pressure sensor that can improve the reliability of blood pressure measurement values.
