0,312, dengan demikian hipotesis nihil (Ho) yang mengemukakan "Tidak ada pengaruh secara signifikan rasa percaya diri terhadap kemampuan komunikasi dalam diskusi kelompok pada siswa kelas VIII SMP Negeri 1 Ketanggungan Kabupaten Brebes Tahun Pelajaran 2009/2010" ditolak dan menerima hipotesis alternatif (Ha) "Ada pengaruh secara signifikan rasa percaya diri terhadap kemampuan komunikasi dalam diskusi kelompok pada siswa kelas VIII SMP Negeri 1 Ketanggungan Kabupaten Brebes Tahun Pelajaran 2009/2010" Selain itu ditemukan juga tingkat pengaruh rasa percaya diri pada siswa dalam kategori cukup tinggi, distribusi frekuensi pengaruh sebesar 37,5% berada dikategori cukup, tingkat kemampuan komunikasi dalam diskusi kelompok dalam kategori tinggi, distribusi frekuensi sebesar 35% berada dikategori tinggi. Saran yang direkomendasikan adalah bagi guru pembimbing diharapkan dapat memberikan perhatiannya dalam membimbing siswa terutama dalam memberikan arahan untuk dapat meningkatkan rasa percaya diri. Inggris : Winarto, 2010. NPM: 1106500313. Thesis title "Effect of Confidence of the Capacity Communication Discussion Group at the eighth grade students of SMP Negeri 1 Ketanggungan Brebes Academic Year 2009/2010". Keywords: Confidence and Communication Skills In Group Discussion Confidence is the strength of one's mental confidence on the ability and the condition itself. Communication skills in students in a discussion can be influenced by a sense of confidence, higher self-esteem of students the higher the level of communication skills. The problem posed in this study is whether there is effect of Confidence on Communication Ability in the Focus Group. Purpose of this study was to determine the level of confidence and on whether the level of communication skills in discussion groups and to determine whether there is confidence the effect of communication skills in group discussions in class VIII SMP Negeri 1 Ketanggungan Kabupaten brebes in Pelajaran 2009/2010. The population in this study are all students of class VIII some 197 students, the sample was set at 40 students as respondents. The sampling technique used by random sampling. Data collection methods used method of questionnaire as the main method, while method as the method of interviews and supporting documentation. From the results of data analysis, found rcount of 0.840. Count value is consulted on rtable, N = 40, the price of a product moment r critique 5% significant level was obtained 0.312. This shows that in fact greater than rtable rhitung is 0.840> 0.312, thus nil hypothesis (Ho), who proposed "No significant effect of confidence on the ability of communication in a discussion group at the eighth grade students of SMP Negeri 1 Ketanggungan Brebes Year Lesson 2009/2010 "rejected and accept the alternative hypothesis (Ha)" There is significant effect of confidence on the ability of communication in a discussion group at the eighth grade students of SMP Negeri 1 Ketanggungan Brebes Academic Year 2009/2010". In addition it was also found to influence level of confidence in students in the high category, the influence of the frequency distribution of 37.5% were classified as adequate, the level of communication skills in group discussions in the high category, the frequency distribution of 35% were classified as high. The recommended advice is for the supervising teacher is expected to give attention in teaching students, especially in providing advice to boost confidence." />