This study's purpose is to develop project learning program to enhance teaching abilities of curriculum integration class of preservice teachers in elementary school. First researchers grobe the learning subject that languages, mathematics, social studies, science are integrated for 4th grade of elementary school. The name of integrated learning subject that we design is "our neighborhood park improvement project". And this integrated learning program is implemented in a lecture for seniors in university of elementary education(preservice teachers). The effects of this implementation follows as: (1) the preservice teachers have more concerns and self-efficacy for curriculum integration class, 2) they have more concerns on local problems, 3) they sympathize with the necessity and the value of more practical projects, 4) they become more interested in discussion.