In this study, we examined the effects of participants’ emotional states on personal space when an approaching person’s face was either masked or unmasked. We used the participants’ uncomfortable stop-distance as our method of measuring personal space. Inducing a positive emotion narrowed perceived personal space, whereas inducing a negative emotion widened personal space. For both positive and negative emotions, the perceived interpersonal distance was shorter when the approaching face was unmasked than masked. There was no interaction effect on personal space between induced affect and masking or unmasking the approaching face. This study might provide insight into interpersonal behavior during a pandemic juncture.