<p>The present invention provides an acoustic wave device having excellent pressure resistance. An acoustic wave device (1) is provided with a piezoelectric substrate (10), an IDT electrode (11), and a cover member (15). The IDT electrode (11) is provided on the piezoelectric substrate (10). The cover member (15) is provided above the piezoelectric substrate (10) and set apart from the IDT el ectrode (11). The cover member (15) has a first cover member (15a) and a second cover member (15b). The second cover member (15b) is layered on a side of the first cover member (15a) opposite to the piezoelectric substrate (10). The glass transition point of the first cover member (15a) is higher than that of the second cover member (15b).</p>
