Indonesian farmers can achieve sustainable livelihoods through organic farming. However, conventional farming is still the major agricultural application in Indonesia. Currently, there is little knowledge about the level of livelihood assets ownership by farmers between organic and conventional paddy farming to achieve sustainable livelihoods. This study is an initial comparison of the level of livelihood assets owned by organic and conventional paddy farmers. 34 conventional farmers from the Mulyo 2 farmer group and 32 organic farmers from Sumber Makmur 1 farmer group in East Java province were recruited as respondents. By using Sustainability Livelihood Analysis, it was found that human capital was at the same level between both farmer groups. The level of natural capital owned by respondents in the Mulyo 2 farmer group is higher than in Sumber Makmur 1. The level of financial, physical, and social capital for respondents in the Mulyo 2 farmer group was lower than in the Sumber Makmur 1 farmer group. It concludes that natural capital is the determinant to achieve sustainable livelihood by respondents in the Sumber Makmur 1 farmer group. Meanwhile, financial, physical, and social capital are the determinants to achieve sustainable livelihoods in the Mulyo 2 farmer group.