Multisensory integration depends on the temporal proximity of events in different modalities. Recent studies have shown that multisensory temporal binding may be related to individual traits (Foss-Feig et al., 2010; Stevenson et al., 2012). Here we show that positive moods in observers enhance the temporal binding of audiovisual multisensory integration. Twenty-five healthy participants observed two identical visual disks moving toward each other, coinciding, and moving away. The two disks were perceived as either streaming through or bouncing off each other (stream/bounce display), and a belief sound around the visual coincidence facilitated bouncing perception (Sekuler et al., 1997; Watanabe and Shimojo, 2001). We asked the participants to report whether the two disks appeared to stream through or bounce off while listening to either exhilarating music of their own choice or a neutral pink noise. The results showed that the participants listening to exhilarating music reported bouncing percept more frequently. The proportion of bouncing percepts was correlated with the valence rating rather than the arousal rating during the experiment. These results suggest that positive moods enhance the temporal binding process in audiovisual integration.