This study aimed to develop a happiness program for early childhood teachers, based on the needs of in-service early childhood teachers. For this purpose, the following 3-step procedure was developed. In Step 1, this study conducted a preliminary research related to the development of the happiness program, and conducted a survey regarding the need for a happiness program targeting teachers currently working at early childhood educational institutes. In addition, this study supplemented the form and substance of the program using a focus group interview with various experts. In step 2, this study composed a draft proposal of the development of happiness program by setting up objectives of the program, contents of education, method of teaching, and specific criteria for assessment based on the basic direction established in the step 1. In step 3, this study conducted a preliminary research based on the draft proposal and composed the final plan for the program after verifying the reliability and validity of the happiness program for early childhood teachers. This study developed an effective program at this point in time when the significance of happiness of early childhood teachers, who can have a profound impact on the positive growth and development of infants and children, is being emphasized. However, a practically applicable happiness program for early childhood teachers remains insufficient, which has a significance in the sense that this study can suggest a program that can be used for education for early childhood teachers or reeducation for in-service teachers.