A game racket comprises a head frame provided with a plurality of first string holes and second string holes for stringing the game racket head. The head frame is provided in the outer surface thereof with a plurality of string protecting casings, each of which has a body portion and a plurality of guide tubes which can be inserted into the corresponding first string holes or second string holes. Some of the string protecting casings are provided with a locating hole which is located centrally between the two guide tubes. The head frame is further provided with a plurality of guide blocks located respectively at the outer side of the string protecting casing and between two adjoining guide tubes. The guide blocks are provided respectively with a locating column corresponding in location to and engageable securely with the locating hole of the string protecting casing.