Purpose. The article provides a review of the main theories and forms of proactive work behaviours, researched in organizational psychology over the last five years. Methods. Over a hundred academic articles from the core of Web of Science database with the highest citation index as well as domestic studies entered the Russian Science Citation Index (RSCI) were selected for the theoretical analysis. Search query included the term «proactive behavior». Based on the selected sources, the content of the main courses of the research of proactive behaviours was determined: proactivity resources (Personal Initiative, proactive motivation theory, Job Crafting), proactive behavior’s forms (voice, resource seeking, proactive helping) as well as proactive behavior in various areas (safety, customer service, staff socialization, career development, occupational health) has been described. Based on this analysis, possible directions for future studies to determine the relevant predictors of proactive behavior in the organization were suggested. Findings. Based on the analysis, possible prospects for future research to identify relevant predictors of proactive behavior in an organization are proposed. 1. Establishment of the most correct causal relationships in the dynamics of proactive behavior. 2. Analysis of the correspondence of various forms of proactive behavior to the realities of different ethnic cultures. 3. Studying the features of proactive behavior in a remote work environment. 4. Training and development of personnel in order to optimize the manifestation of proactive behavior. 5. Assessment of risks and negative consequences of proactive work behavior. 6. Multilevel analysis of proactive behavior (individual, team and organizational). 7. Proactive behavior in the context of organizational sustainability.