This independent study aimed to study opinions of employee at Bangkok Glass Co., Ltd Pathumthani Plant that affected the working motivation. Data were collected from 270 operational level employees by using questionnaires. The statistic used to analyze data were descriptive statistics including Frequency, Percentage, Mean and Standard Deviation; and inferential statistics including Independent Samples t-test, One-Way ANOVA, LSD and Multiple Linear Regression at the significant level of 0.05