An ultrasonic diagnostic apparatus comprising: a main body ; at least one input/output unit coupled to one side of the main body to input data to the main body or to output data transmitted from the main body ; and a connection unit to connect the input/output unit and the main body to each other, wherein the connection unit includes: at least one first connection member connected at one end thereof to the main body and at the other end thereof to at least a portion of the input/output unit , wherein the at least one first connection member itself has a variable length to move the input/output unit relative to the main body ; and a plurality of second connection members coupled to the first connection members and at least one of the main body or the input/output unit so as to come into contact with the same at a point to support load of the input/output unit , and wherein a first main body coupling part of the first connection member and a second main body coupling part of the second connection members are coupled to the main body and arranged in a first plane, wherein a first input/output coupling part of the first connection member and a second input/output coupling part of the second connection members are coupled to the input/output unit and arranged in a second plane, wherein the first plane and the second plane are different planes, and characterized in that the plurality of second connection members has a variable length. a main body ; at least one input/output unit coupled to one side of the main body to input data to the main body or to output data transmitted from the main body ; and a connection unit to connect the input/output unit and the main body to each other, wherein the connection unit includes: at least one first connection member connected at one end thereof to the main body and at the other end thereof to at least a portion of the input/output unit , wherein the at least one first connection member itself has a variable length to move the input/output unit relative to the main body ; and a plurality of second connection members coupled to the first connection members and at least one of the main body or the input/output unit so as to come into contact with the same at a point to support load of the input/output unit , and wherein a first main body coupling part of the first connection member and a second main body coupling part of the second connection members are coupled to the main body and arranged in a first plane, wherein a first input/output coupling part of the first connection member and a second input/output coupling part of the second connection members are coupled to the input/output unit and arranged in a second plane, wherein the first plane and the second plane are different planes, and characterized in that the plurality of second connection members has a variable length. at least one first connection member connected at one end thereof to the main body and at the other end thereof to at least a portion of the input/output unit , wherein the at least one first connection member itself has a variable length to move the input/output unit relative to the main body ; and a plurality of second connection members coupled to the first connection members and at least one of the main body or the input/output unit so as to come into contact with the same at a point to support load of the input/output unit , and wherein a first main body coupling part of the first connection member and a second main body coupling part of the second connection members are coupled to the main body and arranged in a first plane, wherein a first input/output coupling part of the first connection member and a second input/output coupling part of the second connection members are coupled to the input/output unit and arranged in a second plane, wherein the first plane and the second plane are different planes, and characterized in that the plurality of second connection members has a variable length. <EOS>