This study investigated the potential influence of scent on women's mood and perceptions of men's attractiveness. Participants were 58 heterosexual female college students between the ages of 18-35 who were in decent health, did not smoke, and were not pregnant or nursing. They were asked to rate the physical attractiveness, datability, likability, sexual desirability, and perceived age of men in photographs. Photographs were taken from two online databases. During the ratings, the participants were exposed to either a pleasant scent with the putative human pheromone androstadienone or to the same pleasant scent without the pheromone (between subjects design). Analysis of covariance was used to compare effects of pheromone on ratings and pheromone on mood. Although there was a pheromone effect, it was not in the predicted direction. Participants gave higher ratings on datability when smelling the fragrance without the pheromone, suggesting the pheromone actually seemed to cause lower ratings of this quality. On the other hand, the scent with the pheromone may have reduced an increase in negative moods from pre- to post-task. Scent pleasantness was discovered to be an important predictor of both photo ratings and changes in mood during the photo rating session. Although the current study did not provide further evidence that androstadienone is associated with higher attractiveness ratings, it did support the idea that the pheromone may influence mood.