The aim of this study is to develop a four-point Likert-type scale to measure online English language motivation levels of the students studying in an English preparatory department. After the literature review, a 21-item trial form was created and was applied to 235 students. First, factor analysis study was conducted, and it was observed that the scale consisted of five different factors. Then, in line with the expert opinions, the statements indicating attitude were converted into motivation; the revised 21-item scale was applied to 289 students. The data were evaluated by using SPSS and AMOS programs. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were used to control the construct validity of the scale; Cronbach alpha internal consistency coefficient analysis was used to determine the reliability. As a result of the EFA it was seen that the renewed motivation scale had a three-factor structure. These three structures were named as “Language Skills”, “Responsibilities” and “Attitudes”. Afterwards, CFA was performed with the help of structural equation modeling, and the obtained fit index values showed good fit. The Cronbach Alpha internal consistency coefficient was obtained as 0.95 in the analysis performed to measure the reliability level of the scale with construct validity. As a result, it is found that the developed “Online EFL Motivation Scale” is a valid and reliable scale.