Dietary service to aged people has started in Bcity, in 2001. In order to evaluate the effectiveness of a service, the survey using questionnaire sheets was conducted among 80 male and female inhabitants aged from 33 to 95 what used a dietary service. We classified the recipients of the dietary service into two groups with respect to the answer to the question “Did the service change your life style?”. Recipients who answered “Yes” (59 recipients) and those who answered “No” (21 recipients) were compared based on the differences in the recipients dietary habits, health condition, degree of satisfaction with life, ties with the community, financial situation and any changes and no change in their life. These results are summarized below. (1) An analysis using the Hayashi's Quantification II method revealed that the factors yielding a positive score for the effectiveness of the dietary service included (i) family composition where living alone or with a spouse promoted the effectiveness, (ii) a higher degree of unrest for ties with the community promoted the effectiveness, and (iii) finding fulfillment in the dietary habits. (2) Not only dietary satisfaction but also their psychosomatic health has clearly improved for recipients using the dietary service who answered that the service had changed their life style. (3) Ninety-six percent of all the recipients answered that they wanted to continue receiving the service.