An elastic wave device includes an IDT provided on a piezoelectric substrate. The IDT includes edge areas in which an elastic wave propagation velocity is slower than an elastic wave propagation velocity in a center area of an electrode finger intersecting region. The edge areas are provided on both sides of the center area in an intersecting width direction. The IDT includes a first section where the propagation velocity in the center area is relatively fast and a second section where the propagation velocity in the center area is relatively slow in the elastic wave propagation direction. In accordance with the propagation velocities in the center areas of the first and second sections, the widths and propagation velocities in the edge areas of the first and second sections excite a piston mode.