This study investigated the relationship between mindfulness training (a nonjudgmental attentional training technique) and flow experiences in athletes. Participants were 13 university athletes (M = 21 years), assigned either to a control group or an experimental group. Flow experiences were assessed before and after the intervention. ANOVA (group x time) of global scores on the Flow State Scale-2 (FSS-2; Jackson & Eklund, 2004) showed a significant interaction (F = 11.49, p < .05). Follow-up t tests indicated no significant difference (p > .05) between the experimental and control groups’ FSS-2 global scores at the baseline training session, but a large difference (p < .05, d = 1.66) at a follow-up training session. Significant interaction effects were also observed for FSS-2 subscales scores for the flow dimensions of “Clear Goals” (F =18.73, p < .05) and “Sense of Control” (F = 14.61, p < .05). Following an evaluation of the strengths and weaknesses of this study, the theoretical significance of the results is assessed and the promise for the application of mindfulness training in performance enhancement is discussed.