This study was to determine the hindrances to the implementation of competency-based curriculum in junior secondary schools, Tigania west sub-county, Meru County. The problem states that competency- based curriculum has dominated in various African countries but its implementation has been hard since challenges such as: inadequacy of trained staff, infrastructure and teaching and learning materials are not enough. Developed countries such as Finland and New Zealand advised on taking such factors into consideration before implementing the CBC. The following are the objectives that guided the project: to determine how inadequate classrooms and lack of learning resources affect the implementation of CBC, to establish the effects of inadequate trained teachers to implementation of this curriculum and to examine how parents level of education hinders the implementation of CBC. The study focus area was Tigania west sub-county, Meru County with a sample size of 9 junior schools. The sampling technique used was stratified random sampling. Data analysis was done using descriptive statistics. The study used the questionnaire, interview and observation as the research instruments. With the above sampling techniques and the research instruments, this research was able to obtain accurate and reliable data. The researcher gave out the questionnaires to 158 respondents who were the headteachers, teachers and parents. Out of the 158 targeted sample size, only 146 responded. From the collected data, this study recommends that: the parents should be exposed or educated more in matters relating to CBC since it has more parental engagement, training to be offered to the teachers and on time and finally the government to provide the required resources and built more classes for junior secondary schools in Tigania west sub county. The study recommended more research on other challenges facing successful implementation of the curriculum. Other studies should be carried out by different students in various counties to ensure smooth implementation of the curriculum country wide