To provide an engine room internal noise absorption structure capable of uniformly absorbing the wide frequency band sounds within an engine room contributing to the improvement in heat balance.

In an engine room internal noise absorption structure provided with a sound absorbing body 2 within an engine room 1 to absorb the sound within the engine room 1 by the sound absorbing body 2, the sound absorbing body 2 comprises a plate air permeable member 2a having an end part fixed to either one or the both of the inner wall of the engine room 1 and a device 6 within the engine room 1, and sound absorbing materials 2b fixed to both sides of the plate air permeable member 2a.