The aim of this research was to test whether informal communication and salary affected employee's work motivation in PT Indonusa Algaemas Prima Bali. The population and samples of this research were 84 employees as this research used saturated method sampling with a quantitative approach using a multiple linear re­gression analysis. The results indicated that informal communication and salary had a positive and significant impact to employee's work motivation in PT Indonusa Al­ga­emas Prima Bali both partially and simultaneously.