To provide an infrared detection element and an infrared detector which can efficiently absorb incoming infrared ray and effectively utilizing infrared energy obtained.

A pyroelectric element layer including pyroelectric elements 10, 11, and 12, which include a pyroelectric body 2 where the value of spontaneous polarization varies with increase of temperature to create surface charge, an upper electrode 3 arranged on top surface of the pyroelectric body 2, and a lower electrode 4 arranged on bottom surface of the pyroelectric body 2 configures the infrared detection element 100 containing two or more-layered pyroelectric element layer arranged at upside and downside thereof. Moreover, the infrared detector including the infrared detection element 100 is also configured.