This study aims to analyze the effect of using concrete teaching tools on physics learning outcomes on the subject of temperature and heat of senior high school students. All the students of grade 11 of the Natural Sciences program at ESG 1 Baucau became the population. The sample of this research was 66 students of grade 11 Trimester I Natural Sciences at the same school. Researchers used experimental methods, tests, observations, questionnaires, and documentation to collect data. The instrument organized by the researcher with a field-test to test validity and reliability. The Alpha Cronbach = 0.66 and KMO = 0.73 shown the instrument are valid and reliable to collect the data. Data analyzed with simple linear regression. The result shows that the correlation coefficient value (r) has 72.5%, which means positive and significant impacts. The tcount = 8.137 > ttable =1.997, significant = 0.005. Furthermore, the Y = 1,264 + 0.590 shows a significant impact because the leaning value increased to 0.590. Meanwhile, the R2 = 52.6%. These results proved that the use of concrete teaching tools determines the increase and decrease in the learning outcomes of students. This finding concluded that there was a significant impact of using the concrete teaching tools on physics learning outcomes on the subject of temperature and heat of the grade 11 of students majoring in Natural Sciences in Trimester I ESG 1 Baucau, East Timor. This finding recommended to all the Physics teachers who teach in senior high school and subsequent researchers.