An ultrasonic probe, comprising: a plurality of ultrasonic transducers which are arranged in an array form along a first direction and each include a first electrode and a second electrode; a flexible printed wiring board including a base member and a plurality of first wiring portions provided on a first surface of the base member , the plurality of first wiring portions being connected to the second electrodes of said respective ultrasonic transducers ; a lining layer , and a backing member joined to the lining layer , characterized in that : the lining layer is provided on a second surface of the base member , wherein the lining layer is provided between the second surface of the base member and the backing member , and is made of a resin which ensures acoustic matching between the flexible printed wiring board and the plurality of ultrasonic transducers ; the backing member is configured to attenuate ultrasonic waves applied by the plurality of ultrasonic transducers ; a plurality of recesses, which divide said plurality of ultrasonic transducers in an array form, extend through the flexible printed wiring board , and reach to a certain depth into the lining layer ; and said plurality of first wiring portions are arrayed along the first direction at intervals larger than array intervals of said plurality of ultrasonic transducers , and each has a width smaller than a width of said each ultrasonic transducer in the first direction. a plurality of ultrasonic transducers which are arranged in an array form along a first direction and each include a first electrode and a second electrode; a flexible printed wiring board including a base member and a plurality of first wiring portions provided on a first surface of the base member , the plurality of first wiring portions being connected to the second electrodes of said respective ultrasonic transducers ; a lining layer , and a backing member joined to the lining layer , characterized in that : the lining layer is provided on a second surface of the base member , wherein the lining layer is provided between the second surface of the base member and the backing member , and is made of a resin which ensures acoustic matching between the flexible printed wiring board and the plurality of ultrasonic transducers ; the backing member is configured to attenuate ultrasonic waves applied by the plurality of ultrasonic transducers ; a plurality of recesses, which divide said plurality of ultrasonic transducers in an array form, extend through the flexible printed wiring board , and reach to a certain depth into the lining layer ; and said plurality of first wiring portions are arrayed along the first direction at intervals larger than array intervals of said plurality of ultrasonic transducers , and each has a width smaller than a width of said each ultrasonic transducer in the first direction. the lining layer is provided on a second surface of the base member , wherein the lining layer is provided between the second surface of the base member and the backing member , and is made of a resin which ensures acoustic matching between the flexible printed wiring board and the plurality of ultrasonic transducers ; the backing member is configured to attenuate ultrasonic waves applied by the plurality of ultrasonic transducers ; a plurality of recesses, which divide said plurality of ultrasonic transducers in an array form, extend through the flexible printed wiring board , and reach to a certain depth into the lining layer ; and said plurality of first wiring portions are arrayed along the first direction at intervals larger than array intervals of said plurality of ultrasonic transducers , and each has a width smaller than a width of said each ultrasonic transducer in the first direction. <EOS>