Abstract: In a storage apparatus such as a small-sized hard disk apparatus to be built in the body of an information processing apparatus, the body of the storage apparatus comprises a metallic casing and a top cover member. The top cover member is provided with a seal member for sealing a gap between the casing and the top cover member. The body of the storage apparatus is covered with a shield cover member. A metallic shield member is attached to the inside surface of the shield cover member. The shield cover member ensures electrical insulation of the body of the storage apparatus from the structural parts of the information processing apparatus excluding the storage apparatus. The metallic shield member ensures electromagnetic shield effects of, in particular, the seal member in the body of the storage apparatus.