<p><em>The most important event during the girls puberty is the first menstruation or menarche, a marker of biological sexual maturity. Menarche occurs approximately at the age of 11-16 years. Ignorance children about menstruation can lead to the child difficult to accept menarche. Preliminary studies have been carried out in MIN Pengging and didaptakan 6 girls had menarche are seen and it causes the other girls who feel anxious. This study aims to provide an overview of the factors readiness in the face of menarche early teens.</em></p> <p><em>This research method is descriptive quantitative research sample of sixth grade students in the District Pengging MIN Banyudono, Boyolali, using sampling techniques total sample, the number of respondents 36 students, the measuring instrument used with the questionnaire by univariate analysis.</em></p> <p><em>The results of the study most of the 12 -year -old girls (63.8%), they mendaptkan information from peers (44.4%), and most of the girls being negative in the face of menarche (61.1%).</em></p> <p><em>Factors readiness in the face of early adolescence is the age of menarche, resources, and attitudes. For teenagers should mencrai right information beforehand about menarche menarche so ready face.</em></p> <p><em> </em></p> <p><em>Keywords : factors, Readiness, menarche, Early Teens</em></p>