Blood pressure measurement device

A blood pressure measurement device configured to be attached to a wrist, comprising:

• a case including an outer case formed in a cylindrical shape and having two pairs of lugs provided at positions symmetrical in a circumferential direction of an outer surface, and a windshield covering one end of the outer case;
• a strap including a first strap provided on one pair of lugs through a spring rod and a second strap provided on the other pair of lugs through a spring rod;
• a plurality of valves provided in a flow path that supplies a fluid to a cuff inflated by the fluid in the outer case in a position which is closer to one side of the outer case than a center thereof in a second direction orthogonal to a first direction from the one pair of lugs to the other pair of lugs and orthogonal to an axial direction of the outer case;
• a pump provided in the outer case closer to the center of the outer case with respect to the valves in the second direction and on one side from the center of the outer case in the first direction;
• and
• a power supply unit cased in the outer case, disposed on the pump alongside the windshield in the axial direction of the outer case and opposed to the pump;
• wherein:
• the pump and the power supply unit are disposed with a gap therebetween;
• the pump is provided with a suction hole on a surface thereof opposite to the power supply unit;
• the device comprises a hole portion formed between each of the pairs of lugs of the outer case to pass through the outer case and having an opening end on an inner surface of the outer case, the opening end being located at a position opposed to the gap in the first direction;
• and
• the hole portion extends linearly, and one opening end of the hole portion is provided on the outer surface of the outer case closer to the wrist, and another opening end thereof is provided on the inner surface of the outer case closer to the windshield than the one opening end.