Mealtime satisfaction is an important component of quality of life (QOL) in residential care, yet there currently is no self-administered tool described in the literature. The purpose of this study is to investigate internal and test-retest reliability, and construct validity of a mealtime satisfaction questionnaire (MSQ) designed for residential care, more specifically retirement homes. A 15-item MSQ was developed and eligible participants from four retirement homes (n = 749) were invited to participate. The participation rate was 24% and the median age was 88 years for respondents. The internal consistency of the MSQ was high (Cronbach Alpha = 0.83) and the test-retest reliability was also high (Intraclass coefficient = 0.91, P < 0.01). The MSQ was associated with a valid and reliable QOL instrument for older adults (Mann Whitney Test = 1595.5, P < 0.01). The MSQ is reliable and is content and construct valid. QOL can be enriched by improving mealtime satisfaction in retirement homes.