Indonesian Journal of Dentistry 2006; Edisi Khusus KPPIKG XIV 2006: 129-133The premature loss of primary teeth will make the adjacent tooth drift due to the mesial force of the erupting posterior teeth in the growing child. To overcome this problem a space maintainer is need.But, space maintainer need to undergo a laboratorium process, which means needed more time and money. This paper reported a case with premature loss of maxillary first primary molar using space maintainer which can be used immediately, easy to do, and need low cost, a simple fixed space maintainer bonded wirb flowable resin composite.