Abstract: The tropical Pacific Ocean is the main tuna fishing area in the world. The impact of tuna longline fishery on pelagic shark populations has received considerable concerns recently. However, it is difficult to evaluate their population status using formal stock assessment models due to the lack of long-term fishery data. We conduct productivity-susceptibility analysis (PSA) to evaluate the vulnerability to overfishing for 10 pelagic shark species in the tropical Pacific Ocean. The 10 species with risk of overfishing suffered from longline fishery, in terms of vulnerability score, are as follows (in ascending order): smooth hammerhead (Sphyrna zygaena), scalloped hammerhead (S.lewini), great hammerhead (S.mokarran), shortfin mako (Isurus oxyrinchus), common thresher (Alopias vulpinus), oceanic whitetip shark (Carcharhinus longimanus), blue shark (Prionace glauca), silky shark (C.falciformis), pelagic thresher (A.pelagicus) and bigeye thresher (A.superciliosus). The results provide important information for conservation of pelagic sharks and pelagic ecosystem interacting with tuna longline fisheries in the tropical Pacific Ocean.