A suitcase scale is bundled a suitcase for providing functions of scaling and anti-theft. The suitcase scale comprises a housing, a processing unit disposed in the housing, a weight sensor secured in the housing and electrically connected to the processing unit, a combination lock mounted into the housing, a buckle detachably engaged to the housing and a strap having two opposite ends respectively connected to the buckle and the housing. Consequently, the strap, the buckle and the housing form an endless ring for bundling the suitcase when the combination lock is in a locked condition. The suitcase scale immediately shows the total weight value of the suitcase to prevent the user from paying and excessive baggage charge and provides a function of anti-theft due to the combination lock such that a thief or a pickpocket can not steal the belongings in the locked suitcase.