This review, published in Implementation Science, sought to assess the scientific literature on implemented interventions aimed at improving the nursing work environments (NEW) and their effectiveness. Eleven controlled intervention studies met the inclusion criteria, of which eight used a quasi-experimental design and three an experimental design. In total, nine different interventions were reported in the included studies. The most effective interventions at improving the NWE were: primary nursing (two studies), the educational toolbox (one study), the individualized care and clinical supervision (one study), and the violence prevention intervention (one study). To advance the field, the authors recommend that investigators use controlled studies with pre/post measures to evaluate interventions that are aimed at improving the NWE.