The invention relates to a decompression unit (1) for use in a decompression opening (2) of a wall element (3) of an aircraft, having a panel (5) which can be mounted via a frame (4) in or over the decompression opening (2) which panel (5) can be moved out of the frame (4) at a predetermined differential pressure Δρ in order to open the decompression opening (2). In order to form a decompression unit (1) of as simple a design as possible and with an optimum response behaviour, provision is made for the panel (5) to be formed by at least one hardened prepreg layer (6) with at least one separating joint (7) which is filled with cured resin as a weak point, which separating joint (7) breaks when the predetermined differential pressure (Δρ) is exceeded.