Disclosed is an inflatable soft box, which belongs to the technical field of photography and film and television. The present application compromises a flexible case. An inflatable nozzle is provided on the flexible case, and the inflatable nozzle is used to inflate or deflate the flexible case. A soft lamp is provided on the flexible case, and the soft lamp is used to illuminate the flexible case. The structure of the inflatable soft box of the present application is simple. By providing an inflation nozzle on the flexible case, the flexible case is inflated by the inflation nozzle when in use, and the flexible case is inflated; when not in use, the flexible case is deflated by the inflation nozzle, making it easy to carry or move, and convenient for users to use.