The main purpose of the study was to investigate the practice, contribution, and challenges of nonformal technical and vocational training in prison The case of Bahir Dar City Administration Prison. A qualitative case study design was employed to guide this study. The data was collected from the correction & rectification unit coordinator, Trainers of non-formal TVET in prison, inmates, and employed /unemployed ex-inmates who attended the program through in-depth interviews and observation. One coordinator and five trainers were selected by a comprehensive sampling technique, for trained inmates selected by purposive and eight ex-inmates selected by snowball sampling techniques. The collected data were analyzed following the analysis procedures including organizing, reading the transcribed data, coding, developing themes, representing and reporting themes, and finally interpreting meanings of findings. The findings of this study reveal that even if Bahir Dar City Administration Prison facilitated different kinds of nonformal TVET for inmates, they didn’t have the right to decide on the contents to be provided for them and they merely train accordingly the manual prepared by the regional prison commission and TVET commission. Inmates come to the training for parole and forgiveness. The participation of female inmates in training is very low. Some types of training skills like weaving tailoring and beauty salon are important for inmates to earn money but all types of non-formal TVET programs are not economically important for inmates in prison. Trained inmates and ex-inmates are engaged in the income-generating activity, they create job opportunities for others, they are not fighting with any individuals and they are teaching about the seriousness of the crime for the community. The finding also shows that, several challenges related to the absence of payment for inmates in prison, inmates’ behavior, materials and facilities, budget, content, lack of cooperative other concerned bodies, and lack of trainer in the institution highly affected the provision of non-formal TVET in the setting. Based on the finding, it can be concluded that the non-formal TVET program needs serious further interventions in the setting. The implications are the program needs an adequate budget to ensure the fulfillment of training materials and facilities, it is better to concerned bodies work together and partner with the correctional institution to alleviate shortages in resources and facilities, female trainees and trainers need to be accompanied by the police or female-only programs that need to be organized/it has to be female-friendly, and everyone should be given attention for inmates and exinmates.