The invention relates to an air decontamination device. The mobile air decontamination device (1) includes: (i) an inlet port and an outlet port； (ii) a dehumidifying means downstream from the inlet port for dehumidifying the air entering the device (1) via said inlet port； and (iii) a means for evaporating a microbicidal material, which is arranged upstream from the outlet port and downstream from the dehumidifying means, and which is intended for vaporizing the microbicidal material in the air flowing inside the device (1). Furthermore, the dehumidifying means includes a compressor (4) connected to the inlet port for compressing the air entering the device (1), a forced-convection condenser (5) arranged downstream from the compressor (4), and a water-separating filter (6) arranged downstream from the forced-convection condenser (5), the device (1) including a means for adjusting the discharge pressure of the compressor (4).
