The purpose of this study was to determine the positive and significant influence of the Project Based Learning model on the learning motivation of Christian Religious Education (PAK) students in Grade X at SMA Negeri 1 Tarabintang, Humbang Hasundutan Regency. This study used a quantitative research method. The population consisted of all Grade X students of SMA Negeri 1 Tarabintang, Humbang Hasundutan Regency, totaling 54 students, all of whom were used as research respondents. Data were collected using a closed questionnaire consisting of 32 items. The results of the data analysis showed that there was a positive and significant influence of the Project Based Learning model on the learning motivation of Christian Religious Education (PAK) students in Grade X at SMA Negeri 1 Tarabintang, Humbang Hasundutan Regency. This was proven through the following data analysis: the prerequisite test showed a positive relationship with a value of rxy = 0.549 > rtable (α = 0.05, n = 54) = 0.2221, and the significance test showed tcount = 4.733 > ttable (α = 0.05, df = 52) = 2.021. The influence test through the regression equation produced Ŷ = 25.35 + 0.52X with a coefficient of determination (r²) of 30.1%. Hypothesis testing using the F test obtained Fcount > Ftable (α = 0.05, numerator df = 17, denominator df = 52), namely 22.29 > 1.39. Therefore, Ha, which states that there is a positive and significant influence of the Project Based Learning model on the learning motivation of Christian Religious Education (PAK) students in Grade X at SMA Negeri 1 Tarabintang, Humbang Hasundutan Regency, is accepted, while H0 is rejected.