Objectives: To evaluate methods for monitoring the nutritional status of patients with pressure ulcers (PU). Design: A retrospective case series study. Setting and Participants: Twenty-nine patients (mean age, 80.6 years; 10 men) with PU admitted to the acute care ward of Namegata District General Hospital, Japan, were recruited. Measurements: The nutritional status of the patients was evaluated using the controlling nutritional status (CONUT) method. The wound assessment tool DESIGN-R was used to evaluate the wound state of PU. The rate of improvement in CONUT score (CR) was calculated for each patient from the CONUT values at the beginning and end of the observation period divided by the number of days. In addition, the rates of improvement of the serum albumin level (AR) and DESIGN-R level (DR) were also calculated. Results: There was a moderately strong correlation between CR and DR that was significant (r = 0.60, p < 0.01); however, the correlation between AR and DR was weaker and not significant (r = 0.36, p = 0.056). Conclusion: Improvement in nutritional status evaluated by CONUT correlated with the improvement in ulcer severity evaluated by DESIGN-R in patients with PU. The CONUT method is suitable for nutritional status monitoring of the patient with PU in a hospital setting.