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Background: The purpose of this study was to compare the immediate effects of the Mulligan concept bridge technique mobilization and Maitland mobilization applied to the cervicothoracic junction in patients with neck pain accompanied by mobility restrictions. Methods: One hundred and one individuals with neck pain were randomly assigned to two groups. The experimental group (n=51) received the Mulligan concept bridge technique applied to the cervicothoracic junction, while the control group (n=50) received direction-specific Maitland mobilization. To assess the effects of the interventions were assessed by measuring the cervical range of motion (ROM), muscle tone, and pain levels were measured before and after the treatment. An independent t-test and a paired t-test was were used for between-group comparisons, and a paired t-test was used for and within-group comparisons, respectively. Results: The results showed that the experimental group demonstrated significantly greaterimprovements in cervical extension (p<.01), lateral flexion (p<.05),and rotation range of motion (p<.05), as well as greater reductions inmuscle tone (p<.01) and pain levels (p<.01) compared with the control group, whereas no significant differences were found in flexion or stiffnessbetween the groups. Conclusion: The Mulligan concept bridge technique applied to the cervicothoracic junction demonstrated immediate improvements in cervical range of motion, muscle tone, and pain in patients with restricted neck mobility. These results suggest that this technique may be an effective intervention for patients with neck pain accompanied by movement limitations.