Purpose: This study was conducted to develop a mobile web-based pregnancy health care educational program for mothers who wereat an advanced maternal age (AMA) and to verify the effects of the program on pregnancy health care. Methods: This program wasdeveloped using a web-based teaching-learning system design model and composed of 10 subject areas. This research was a quasi-experimentalstudy using a non-equivalent control group pretest-posttest time serial design and data were collected from April 2 to May3, 2014. To verify the effects of the program, it was used for 2 weeks with 30 AMA mothers (experimental group). For the controlgroup, a classroom education booklet for pregnant women used with 31 AMA mothers. Results: The experimental group having participatedin program had statistically significantly higher scores for knowledge (t=3.76, pqqqlt;.001), self-efficacy (t=8.54, pqqqlt;.001), and practicebehavior (t=4.88, pqqqlt;.001) of pregnancy health care, compared to the control group. Conclusion: The results of the program indicatethat a Mobile web-based pregnancy health care educational program is effective in meeting the needs of AMA mothers and canbe used as the prenatal educational program for AMA mothers and is appropriate as an educational media for theses mothers.