Introduccion: El dolor lumbar tiene un alto impacto en la calidad de vida del personal de enfermeria dada la elevada prevalencia, que oscila entre 53,9- 87%, encontrada en diferentes estudios. Objetivo: Determinar la prevalencia de dolor lumbar y su relacion con los factores de riesgo biomecanico en el personal de enfermeria de una entidad de salud de cuarto nivel en Bogota. Metodologia: Se realizo un estudio de corte transversal con exploracion analitica. Se tomo una muestra aleatoria de 265 individuos, estratificada por servicio de atencion, a quienes se les aplico un cuestionario en linea sobre las caracteristicas individuales y labora- les de riesgo biomecanico, con preguntas seleccionadas de Ergopar y Cuestionario Nordico. Resultados: La prevalencia de dolor lumbar fue 61,1%. Los factores de riesgo biomecanico asociados fueron: posturas que implican girar y/o inclinar espalda y/o tronco (p<0,05) y tiempo de movilizacion de pacientes (p=0,007). Los riesgos laborales que se relacionan con el dolor lumbar fueron: tipo de contrato (p=0,004), exigencias fisicas del trabajo (p=0,001) y la imposibilidad para realizar el trabajo por causa del dolor lumbar (p=0,000). Conclusiones: La prevalencia de dolor lumbar en personal de enfermeria es alta y coincide con los estudios realizados a nivel nacional e internacional. La prevalencia por servicios y jornada laboral no presentaron asociacion significativa. La exposicion a factores de riesgo biomecanico se relacionan entre otros con la estimacion del dolor lumbar en el personal de enfermeria afectando su calidad de vida. NURSES LOW BACK PAIN PREVALENCE AND ITS RELATIONSHIP WITH ASSOCIATED BIOMECHANICAL RISK FACTORS DURING 2014-2015 ABSTRACT Background: Low back pain in nurses have a high impact in their quality-of-life due to its high prevalence, observed in between 53,9-87% of cases according to different studies, and produced by occupational requirements. Objective: To determine low back pain prevalence and its relationship to the associated biomechanical risk factors in a nurse population from a fourth level health institution in Bogota. Methodology: A cross-sectional study with analytic exploration was performed. A random sample of 265 individuals stratified by allocation service was extracted. They were administered an online questionnaire about individual, labor and biomechanical risk characteristics. We selected some items of the Ergopar questionnaire and Nordic questionnaire to develop the final instrument. Results: Nurse’s low back pain prevalence was 61,1%. The associated biomechanical risk factors: were: positions involving spinning turning and/or tilting of the back or trunk (p<0,05), and overtime of patient mobilization (p=0,007). The associated occupational factors related to low back pain are the undefined type of contract (p=0,004), high physical requirements of the job (p=0,001) and the history of low back pain disability (p=0,000). Conclusions: The nurse’s low back pain prevalence is very high and concords with other studies performed by national and international authorities. The prevalence distributed by services and workday assigned were not significative correlated. Exposure to biomechanical risk factors associated to the presence of low back pain in nurses, affect their quality of life.