According to the provisions of international civil aviation convention and civil aviation law of the Peoples Republic of China, international air passenger should have valid visas and accept the inspection while entering and exiting Chinese border. Whether air carrier is responsible to remind and inform travelers visas is a controversy focus of visa dispute, for which judicial and academic circles have different points of view. The authors argues that air carrier does not have agreed obligations of informing air passengers visa matters because preparing valid visa is the outgoing passengers legal accompanying obligations, that the purpose for airlines to check visa compliance is to avoid damaging their interests, which should not be the justification of their collateral obligation, and that it is more targeted and feasible for the passengers to query requirements for qualified visa and to prepare it during the practice.