An elastic wave device is configured such that a first surface acoustic wave chip including a piezoelectric substrate is mounted on a package board, a center of the first surface acoustic wave chip is shifted from a center of the package board when viewed from above, and a crystal Z-axis orientation of the piezoelectric substrate of the first surface acoustic wave chip is slanted to extend toward an outer side portion from a central portion of the package board as it progresses toward an upper surface from a lower surface of the piezoelectric substrate.