This study aims to construct and validate a questionnaire that allows Parents’ Perceptions of the complementary Baby-Led Weaning feeding method (PaPerc-BLW questionnaire) to be evaluated. An instrumental design was used. Five child nutrition experts took part in the development and content validity. The questionnaire was administered to a sample of 216 Spanish parents of infants aged 0–6 months to determine psychometric properties (construct validity and internal consistency). The factor analysis explained 65.12% of variance with three factors (Promoting infant autonomy and development; Infant’s health; Parents’ fear to apply BLW), and internal consistency was α = 0.67. The mean score of the PaPerc-BLW questionnaire for the total sample was 4.14 (DS = 0.64, 95% CI = 4.06–4.23). Significant differences were found in the parents’ perception of baby-led weaning feeding method based on variables as previous children (p ≤ 0.001). Otherwise, the sample included in the study could bias the results, since 98.6% indicated that they were familiar with the BLW method and 62% had previous experience Despite this limitation, the PaPerc-BLW questionnaire offers adequate validity for evaluating parents’ perception of the baby-led weaning method.