Provided is a capacitive transducer having a wide frequency band width and an improved transmitting and receiving sensitivity, the capacitive transducer including an element including a plurality of cells: each of the plurality of cells including: a first electrode a vibrating film including a second electrode, the second electrode being opposed to the first electrode with a gap and a supporting portion that supports the vibrating film, in which the element includes a first cell and a second cell as the cell, the first cell including the vibrating film having a first spring constant, the second cell including the vibrating film having a second spring constant smaller than the first spring constant and a distance between the first electrode and the second electrode of the first cell is smaller than a distance between the first electrode and the second electrode of the second cell.
