Background: -Emergency contraceptive (EC) is a type of modern contraception that is indicated after unprotected sexual intercourse or contraceptive failure. Use of EC with in defined time period could prevent unwanted pregnancy and its contingency like unintended child birth unsafe abortion any extended family. Objective: -The aim of this study was to assess the level of knowledge, attitude and practice on Emergency Contraceptive among women, attending antenatal care at ALERT Hospital in 2020, Addis Ababa, Ethiopia. Methods: -An Institution based cross-sectional descriptive study involving 284 women who attended antenatal care at ALERT Hospital. Three trained data collectors were involved in data collection process. Data was collected after obtaining verbal informed consent from the respondents. Data has been continuously collected until the required sample size is obtained. Data has been collected using pre-tested structured questionnaires rgeb interview technique. The data was coded and entered into EPI-INFO version 7 and transported and analyzed using SPSS version 25 for analysis. Descriptive analysis was applied to estimate the Emergency contraceptive use and describe the study participants. Results: -From total of 267 respondents 231(86.5%) heard about Emergency contraception. Among them 164(61.4%) know Emergency oral contraception, 60(22.5%) know only Intrauterine device (IUCD) and 11(4.1%) know both Emergency oral contraception and IUCD. of respondents hard about Emergency contraception only 53(19.9%) had positive attitude and from 231 respondents who ever heard about Emergency contraception 120(44.9%) mentioned they had used OEC at least one time. Conclusion and Recommendation This study showed that the major barrier to use of EC is low attitude towards EC. Therefore providing health education in health facilities would be important to change the attitude about EC.