The quasi-experimental study was designed to compare effects of two telecollaborative learning models, asynchronous (ATL) and synchronous telecollaboration learning (STL), on Korean elementary school students’ motivation, anxiety, and intercultural communicative competence (ICC). To evaluate the 27 participants’ motivation and anxiety level, a pre-test and a post-test were administered and the motivation level and the anxiety level were compared between the ATL and the STL group. On the completion of the project, to examine their ICC development, the participants were interviewed by the researcher with questions constructed based on five objectives of Byram’s intercultural competence. The results are as follows: (1) The two groups did not show any significant differences in increase their motivation level. However, when examining in more detail, the participants in ATL increased their instrumental motivation while those in STL increased their integrative motivation. (2) There was no significant difference in anxiety level between the two groups. At last, (3) regarding ICC development, the participants both in the ATL and in the STL greatly improved their knowledge, attitude, and skills, but ATL participants, compared to STL participants, demonstrated relatively limited changes in their critical cultural awareness. Implications to enhance elementary school students’ motivation and ICC by telecollaboration are suggested.