The premotor cortex (PMC) is known to support reaching and grasping actions, and motor recovery after stroke. However, its relationship with eating-related activities post-PMC stroke remains unclear. This retrospective cohort study aimed to investigate the association between the normalized PMC stroke volume and Functional Independence Measure (FIM) eating scores. We analyzed patients (n=17) with acute PMC infarction to ensure a broad sample, regardless of dominant hand or lesion side, sex or age. The normalized PMC stroke volume was calculated as the ratio of the PMC stroke volume to the total PMC volume, both manually measured on MRI. FIM eating scores were extracted from medical records within approximately four weeks post-stroke. Statistical analyses consisted of four steps to evaluate the relationship: (1) Spearman’s rank correlation; (2) ROC analysis; (3) Mann–Whitney U test; and (4) logistic regression. As a result, Spearman’s correlation showed that the relationship was negative (P = 0.000481). ROC analysis identified a cutoff value of the normalized PMC volume as 0.112 (sensitivity 0.857, specificity 0.900) corresponding to a FIM eating score ≥5 or ≤4. The Mann–Whitney U test demonstrated a significant difference between two groups dichotomized by the cutoff value (P = 0.000826). Logistic regression revealed that patients with a normalized PMC volume > 0.112 had an odds ratio of 54.0 for having a FIM eating score of ≤4 (P = 0.00821). These findings suggest that the premotor cortex stroke volume has the potential marker to aid in guiding treatment strategies for eating action in acute stroke.