The laboratory training is one of the most important methods of the distinctive and fundamental role that stimulate the skills of creative scientific thinking and develop deductive and critical thinking to cope with the scientific developments and technological progress in the world. Therefore, it has been found that many researchers conducted at different levels of learners pointed to the importance of the inclusion of this type of teaching methods, Which makes the learner in direct contact with the artificial environment simulates what is happening in the laboratories and factories and areas of work related to their competence after graduation, which leads the student to be able to link the theoretical information received in the theoretical lesson with the information in the scientific laboratory. In this statistical work has been conducted for two categories of students, the first category was subjected to the experiment of scientific laboratories) scientific laboratories (to support the theoretical approach, and the second category is students who have been absent or not attended scientific laboratories so they did not acquire the skills of applied scientific work .it was found that clear differences between the two categories, where the first group responded positively to the theoretical test and a higher success rate compared to the second category. This study was conducted to evaluate the effect of the scientific laboratory (specifically the experimental laboratory) on the academic performance of undergraduate students (junior and senior) of the Chemical Engineering Department at the University of Technology in Baghdad, For the academic year 2017-2018. The number of students ranged from 24 to 26 students.