The purposes of the study were to exposure disciplinary problems of secondary school students in Private and Missionrnsecondary schools in A.A, to forward possible solutions for the identified problems and to, show effective andrnappropriate ways in order to avoid or minimize such problems of students. To these ends, attempts were made by thernstudy to identify prevalent diSciplinary problems of students and their possible causes by examining the homernbackground, school related factors , peer group factors and personal conditions of students with disciplinary problems.rnMoreover, the study proposed more effective and appropriate means to alleviate disciplinary problems of students.rnThe study waS conducted on eleven selected sample Private and Mission secondary schools in Addis Ababa. From thernsample schools 66 teachers and 411 students were randomly selected to be involved in the study. Data were collectedrnfrom these respondents using questionnaire. All the respondents with no exception filled in and returned thernquestionnaire. Then collected data were analyzed using percentage, one-way ANOVA and mean score methods.rnThe findings on the study revealed that Private and Mission secondary school students in Addis Ababa reflected arnnumber of diSCiplinary problems, of which the most important ones were talking or indulging in conversation in thernpresence of the teacher, sleeping in class, failure to do homework and class work, absenteeism, coming to schoolrnwithout materials, late coming or tardiness, disobeying teachers and not listening to them and cheating.rnBesides, the study groups perceived a moderate relationship between the over all students disciplinary problems andrnthe degree of their disruption of the teaching-learning process. The result of the study also indicated that higherrnfrequency of diSCiplinary problems does not necessarily imply-higher degree of disruption.rnThe findings of the study also indicated that there were many factors of diSCiplinary problems in the home, thernschool, peer groups and in the personal conditions of students. To be more specific, regarding the home background ofrnstudents the study showed that students in Private and MiSSion secondary schools were reflecting diSciplinaryrnproblems partly because of their home life situations.rnSimilarly, the study indicated that there were problems related to teachers and school administration. Thesernproblems were found to be major causes for Private and Mission secondary school students' disciplinary problems.rnWith regard to peer group, the finding of the study indicated that peer related factors have only a minor effect ofrnPrivate and Mission secondary school students' disciplinary problems. As far as personal conditions is concerned, thernstudy disclosed that adolescence and related factors were major causes for the disciplinary problems observed inrnPrivate and Mission secondary schools.rnLastly, as it is evident from the findings in the study positive diSCiplinary measures were found to be effective andrnappropriate to minimize or avoid disciplinary problems of students.