A cell of an ultrasonic transducer is provided. The cell includes a substrate a supporting portion disposed on the substrate a thin film spaced apart from the substrate and the supporting portion and a connection portion which connects the supporting portion and the thin film. The connection portion may include a deformation portion that is elastically deformable. A channel of the ultrasonic transducer includes a plurality of cells arranged in an array. The ultrasonic transducer includes a plurality of channels arranged in an array.
