A protection cover is used for sleeving over a portable product so as to help protect the product from being scratched. The protection cover includes a shock-absorbing structure for shielding and concealing a corner of the portable product. The shock-absorbing structure is formed with an air chamber bulging outwardly from the corner of the portable product. The shock-absorbing structure further has an inner region that defines an opening for access into the air chamber and that abuts tightly and sealingly against the corner of the portable product so as to convert the air chamber into an air-trapped chamber when the protection cover is sleeved over the portable product.