Background: Maternal health problems are often closely related to local specific cultural customs. In the formulation of a policy, the local context is often overlooked in decision making that is often applied generically the same for the whole region. Objective: To describe maternal health behavior in related with local wisdom and tradition Methods: This research is a descriptive qualitative research by using ethnographic approach in the Muyu ethnic-group in Mindiptana District, Boven Digoel. In this research, researchers lived and mingled with Muyu ethnic-group for 60 days (May-June 2014). In the ethnographic research researcher is the main instrument. Result: Muyu has a strong belief related with dirty atmosphere which come from maternity and menstruation. This dirty environment could be weakening, or even could loss the power of male Muyu. Its urged community to isolate every Muyu women who will had childbirth. It's also strongly supported with customary for noncompliance. Conclutions:, Muyu belief women should be isolated during the time of giving birth.. Iptèm is the dirty blood of women in labor.This exile is an obligation that must be run, which is reinforced with a fine if it does not comply. Muyu communities' belief about ìptèm on labor embodied into "home delivery is not in the house" is an opportunity that must be arrested. This should be used to shift the pattern of labor "is not in the house of origin" to deliver in health facilities by health personnel.