Background: Patient safety is seriously threatened by bacterial infections that spread through blood transfusions (TTBI). It has been noticed that a number of infectious viral, bacterial, and parasitic pathogens are involved as barriers to the patient's blood safety. This study aimed to determine the antibiotic resistance pattern of bacteria in the donors' blood attending Federal Medical Centre, Birnin Kebbi, Kebbi State, Nigeria. Methods: The study adopted a cross-sectional research design. A structured questionnaire was administered to 120 blood donors to obtain bio-demographic information and their blood was collected accordingly. The blood samples were processed using standard bacteriological analysis. The isolated bacteria was confirmed using standard biochemical tests. The identified bacteria were subjected to antibiotic testing using the Kirby-Bauer disc diffusion method. Results: Twenty-four 24(20.0%) blood samples were found contaminated with bacteria. The main bacteria isolates were Gram-negative organisms namely- Klebsiella oxytoca (20.8%), Citrobacter diversus (16.7%), Enterobacter aerogene (16.7%), Shigella sonnei (12.5%), Shigella dysentrae (4.2%), Morganella morganii (4.2%), Escherichia coli (4.2%)with only Staphylococcus aureus (20.8%) as Gram-positive bacteria. The prevalence rate of TTBIs was high within the age group 36-49 years 12(50.0%). Morganella morganii was (100%) resistance to all the antibiotics used in this study. Conclusions:  the study revealed that, donors' blood was contaminated with Gram-negative bacteria which are capable of causing sepsis and which may result in death. Therefore, it is recommended that screening for bacterial infections should be done routinely because of the threat it posed as seen in Federal Medical Centre, Birnin Kebbi, Kebbi state, Nigeria.