Acoustic wave device, high frequency front end circuit, communication apparatus, and manufacturing method for acoustic wave device

An end surface reflection acoustic wave device in which acoustic waves are reflected between a first end surface and a second end surface opposing each other, the acoustic wave device comprising:

• a piezoelectric body including the first end surface and the second end surface, and a first principal surface and a second principal surface opposing each other and connecting the first end surface and the second end surface;
• a first electrode finger provided on the first principal surface of the piezoelectric body and extending in a second direction, where a direction in which the first end surface and the second end surface are connected is defined as a first direction and a direction orthogonal or substantially orthogonal to the first direction on the first principal surface is defined as the second direction;
• and
• a second electrode finger provided on the first principal surface of the piezoelectric body, arranged separately from the first electrode finger with a gap interposed between the first electrode finger and the second electrode finger, and extending in the second direction on the first principal surface of the piezoelectric body;
• wherein
• a portion in which the first electrode finger and the second electrode finger overlap with each other when viewed from the first direction is defined as an intersecting portion, a distance between the first end surface and the second end surface of the piezoelectric body is defined as a width of the piezoelectric body, and the piezoelectric body is provided with a different width portion having a width different from a width of the piezoelectric body at a central portion of the intersecting portion in the second direction in a region where the first end surface and the second end surface oppose each other.