Abstract-The paper aims to examine the influence of care culture (collaboration, trust, and learning) towards knowledge sharing behavior. A purposive sampling and a structured questionnaire survey were employed in approaching 200 social workers from membership-oriented NGOs (n=100) and service-oriented NGOs (n=100) located in Klang Valley area, Malaysia. A multiple regression and an independent sample t-test were used to test the hypotheses. Findings revealed trust (52.1%) and collaboration (28.5%) significantly predict knowledge sharing. Despite the fact, learning culture does not appear as a predictor variable, this study also discovered service-oriented NGOs have a high level of trust, collaboration, learning, and knowledge sharing as compared to membership-oriented NGOs. The present study contributes to previous literature by providing comparison data of different categories of NGOs.