Objective: Smoking is an important risk factor of coronary artery stenosis after angioplasty. Therefore, this investigation aimed to determine the effectiveness of a motivational text-messaging program for smoking cessation after coronary angioplasty. This quasi-experimental study was conducted on ۱۰۰ patients after angioplasty. The patients were divided randomly into two intervention and control groups. The intervention group received ۳۲ text messages about smoking cessation for ۲ months. The control group received only routine training. The primary and secondary outcomes were success and self-efficacy in quitting smoking cigarettes, respectively. Both groups filled out the related questionnaires before and after the intervention. The data were analyzed using SPSS software version ۲۲ and Chi-square tests, independent t-test, and paired t-test. P < ۰.۰۵ was considered significant.