Ubud Public Market is visited by many foreign and local tourists. The increase of tourists to Ubud caused a negative impact from the development of tourism is the environment because the amount of waste generated in every place. The level of knowledge and awareness of traders in terms of waste management is still very less, seen from the general aspects of waste management is the stage of collection, transportation and final disposal. The purpose of this research is to know the knowledge, attitude and actions of trader’s about waste management at Ubud Public Market Ubud Subdistrict Gianyar Regency 2017. This research type is descriptive observasional. Samples in this research are 100 traders selling at Ubud Public Market Ubud Subdistrict Gianyar Regency. The data collected in this research are primary and secondary data. Data collection was done by using questionnaires to assess the level of knowledge, attitude and action of traders and observation sheet used to observe directly the waste management in Ubud Public Market Ubud Subdistrict Gianyar Regency. The data has been collected and then processed and presented in the form of tables or graphs. The result of this research is a traders with good knowledge of 49 people (49%), traders who have good attitude 51 people (51%), traders who have medium action 76 people (76%).