OBJECTIVES: Aim of this research was to investigate ideal attribution with revealing the relevance between pharmacy attribution and patients’ outcomes. METHODS: A self-completion questionnaire from composed of two forms of “Pharmacy attribute” and “Patients attribute” was delivered to 3321 pharmacies across Japan which agreed to join in January 2013. Pharmacy attribute: a number of pharmacist, prescription/day, home-visiting patients/ month, cooperated medical facilities. Patients attribute: adverse drug event, change in prescription, change in adherence, finding of unused drugs, and change in the amount of unused drugs. We grouped by 2 indexes (a number of prescription/day/pharmacist as ‘work load’ and cooperated medical facilities as ‘positivity to cooperate’) to 4 groups. (Used SPSS ver.21) RESULTS: Among 1,890 community pharmacies data (collecting rate: 56.9%), we extracted answers to all the question items about community pharmacy attribute necessary for grouping.  The 1,327 community pharmacies data was collected as the target (the number of patient data: for 4,947) for the analysis. The data of 1327 pharmacies showed the middle of attribution showed 20 prescriptions filled /day/pharmacist (work load) and 1 medical facility cooperated. The group of ‘Prescriptions≦20 and Cooperated facility>1’ and the groups of ‘Prescriptions>20 and Cooperated facility>1’  changed in prescription(p<0.003), changed in adherence(p<0.001), find of unused drugs(p<0.001), and decreased the amount of unused drugs (p<0.001) more than others. There is no significant differences in adverse drug event.  CONCLUSIONS: It was suggested that there was relationship between pharmacy attribution (work load/ positivity to cooperate) and patient's outcomes on healthcare service of home-visiting.