Provided is an ultrasonic diagnostic apparatus (200) equipped with: a probe (210) which receives an ultrasonic signal reflected by a subject； a processing unit (260) which generates image information on the basis of the ultrasonic signal； and a liquid crystal display (270) which displays the image information, wherein the liquid crystal display is equipped with a liquid crystal panel (110) which is equipped with a pair of substrates (113, 114) disposed to face each other and a liquid crystal layer (115) sandwiched between the pair of substrates, a pair of polarizing plates (111, 112) which are respectively disposed on the light source side and the display surface side of the panel and form crossed Nicols, a first optical element (120) in which light blocking layers and light transmission layers are alternately and continuously arranged in a planar direction and which is disposed between the light source-side polarizing plate and the light source, and a second optical element (130) which has a surface scattering function and is disposed on the display surface-side polarizing plate, and the first optical element is disposed such that the long axis of the light blocking layer that is an axis in a light transmission direction is directed in a direction determined on the basis of the cross Nicols and/or the second optical element.L'invention concerne un appareil de diagnostic à ultrasons (200) équipé : d'une sonde (210) qui reçoit un signal à ultrasons réfléchi par un sujet ； d'une unité de traitement (260) qui génère des informations d'image sur la base du signal à ultrasons ； et un affichage à cristaux liquides (270) qui affiche les informations d'image, l'affichage à cristaux liquides étant équipé d'un panneau à cristaux liquides (110) qui est équipé d'une paire de substrats (113, 114) disposés l'un en face de l'autre et une couche de cristaux liquides (115) prise en sandwich entre la paire de substrats, une paire de plaques de polarisation (111, 112) qui sont respect
