In this study, it was aimed to plan a training program regarding vaccination chronically ill women group and investigate the effects of providing this training with the Pecha Kucha method on attitudes toward vaccination. This study was carried out between August 2021 and September 2021 using a pretest-posttest, prospective, randomized-controlled experimental design with an effect size (Cohen's d) of 1.005. The study was completed with 35 patients in each of the experimental and control groups. An introductory information form and the Attitudes toward the COVID-19 Vaccine Scale were used to collect data. While vaccination training was given to the experimental group via smartphones using the Pecha Kucha method, it was given to the control group with the classical verbal instruction method. The data were collected before the training, right after the training, and 3 months after the training. The statistical analyses included Pearson's chi-squared test, the Mann-Whitney U test, the Friedman test, and the Wilcoxon signed-rank test. In the second and third measurements, the rate of positive attitudes toward the vaccine and the rate of vaccination were higher in the experimental group (p < .05, p < .05). Training regarding vaccination via smartphones using the Pecha Kucha method may play a role in the development of positive attitudes toward the vaccine and the improvement of vaccination rates.