This independent research the objectives were 1) to study the factors of human error, 2) to study air transport accidents, and 3) to study the relationship between human error affecting air transportation accidents of airline employees. The sample group used in this research was airline employees. By using questionnaires as a tool to collect data The statistics used in the descriptive analysis were frequency, percentage, mean and standard deviation. Test the hypothesis to compare the results of the research. It was found that human error affecting air transportation accidents of airline employees. Overall, it was at a low level. Operational efficiency of airline personnel the overall picture is at a high level. Individual factors with different gender, age, occupation, status, age of employment and income It is effective in performing different tasks. And in each aspect of behavior while working and the aspect of violating the rules while working is different from person to person