To better understand the antecedents of support provision within relationships, this study examined the potential role of a novel individual difference; spouses' stress mindset (i.e., beliefs about whether stress-is-enhancing or stress-is-debilitating). As individuals with a stress-is-enhancing mindset often underestimate other's stress, we hypothesized that those with a stress-is-enhancing mindset will generally provide less and worse support compared to individuals with a stress-is-debilitating mindset. The results revealed few significant associations and the associations that were significant were contrary to predictions. For example, wives with a stress-is-enhancing mindset provided more support, and husbands who perceived their partner as having a more stress-is-enhancing mindset provided better support. Further research is needed to replicate these results and determine whether stress mindset has interpersonal consequences.