As　a　clean,　sustainable　transport　tool,　bicycles　have　significant　advantages　in　short-distance　travel.　Despite　many　efforts　assumed　in　Beijing　to　improve　the　cycling　environment,　the　popularity　of　cycling　remains　relatively　low.　However,　the　advent　of　the　free-floating　bike-sharing　(FFBS)　system　has　engendered　an　unexpected　cycling　enthusiasm　in　Beijing.　Therefore,　it　is　of　great　importance　to　delve　into　why　travelers　prefer　FFBS　as　a　transportation　form　from　a　psychological　perspective.　In　this　paper,　352　valid　questionnaires　were　collected　from　an　online　survey,　and　an　extended　theory　of　planned　behavior　(TPB)　was　adopted　to　examine　the　psychological　determinants　of　intention　and　actual　behavior　to　use　FFBS.　The　results　showed　that　men　and　car-owners　prefer　vehicles　and　show　a　lower　willingness　to　use　FFBS.　In　contrast,　residents　under　the　age　of　60,　residents　with　FFBS　riding　experience,　and　residents　skilled　in　cycling　are　inclined　to　use　FFBS;　the　economic　convenience　of　FFBS　is　the　most　important　attractant　for　FFBS,　while　bad　weather　is　the　biggest　hindrance　factor　for　residents　to　use　FFBS;　however,　imperfection　in　infrastructure　has　no　significant　impact　on　reducing　residents＇　willingness　to　use　FFBS.　These　results　have　important　implications　for　planners　to　better　understand　the　FFBS　use　behavior,　and　several　suggestions　are　proposed　to　support　the　policymaking　about　FFBS.