The present study addresses the critical contamination issue of arsenic (As) in agricultural soils, which delimits crop productivity as well as food safety. This research explores the potential of the arsenic-tolerant plant growth-promoting bacteria (PGPB) Pseudomonas putida CKVF1 to alleviate As-induced negative effects in Vicia faba L. (also known as broad bean or faba bean) seeds when sown with and/or without As (50 mg/kg soil) and inoculated with P. putida CKVF1. Morphological parameters such as chlorophyll content, moisture retention, and nodulation were assessed alongside biochemical markers, including malondialdehyde (MDA), proline levels, antioxidant enzyme activities, and phenolic compound profiles. Microscopic analyses were conducted to evaluate cellular integrity. Results showed that arsenic exposure significantly impaired the growth of plants and increased MDA level which is an oxidative stress marker. However, PGPR treatment enhanced chlorophyll content, moisture retention, and nodulation by 35%, 28%, and 40%, respectively, while reducing oxidative damage through elevated antioxidant enzyme activities. Microscopic observations confirmed improved cellular structure in PGPR-treated plants. Additionally, PGPR inoculation increased total phenolic content and specific phenolic compounds, enhancing stress tolerance. The results highlight the effectiveness of P. putida CKVF1 in alleviating As-toxicity through physiological and biochemical improvements; and present a defensible approach to augmenting crop resilience in As-contaminated regions. This study emphasizes the PGPR potential as a bioremediation tool for promoting agricultural sustainability in the areas affected by heavy metal contamination.