Elastic wave device

The invention relates to an elastic wave device, and relates to the field of elastic wave devices. Comprising a piezoelectric substrate and an interdigital transducer electrode arranged on the piezoelectric substrate, the interdigital transducer electrode comprises n electrode fingers arranged at intervals in the elastic wave propagation direction, n is a positive integer value, and each electrode finger has respective electrode finger width, electrode finger gap and electrode finger period, the n electrode fingers have an arithmetically average electrode finger width, an arithmetically average electrode finger gap, and an arithmetically average electrode finger period. There are m electrode fingers among the n electrode fingers, and at least one of a ratio of an electrode finger width of any one of the m electrode fingers to an arithmetic average electrode finger width, a ratio of an electrode finger gap to an arithmetic average electrode finger gap, and a ratio of an electrode finger period to an arithmetic