In recent years, climate extreme events have increased compared to the past decades. The aim of this study was spatio-temporal analysis of extreme precipitation indices in Ardabil province, using the daily precipitation data of several stations namely Khalkhal, Ardabil, and Parsabad during the baseline period of 1993-2020. Extreme precipitation indices were calculated using the RClimDex software package and their trend were calculated based on the Mann-Kendall test and the Sen's slope estimator. The results showed no increasing trend in extreme precipitation indices in the central and southern regions of Ardabil province, most of the extreme indices had a non-significant decreasing trend. In the northern station of Parsabad, most of the indices had a non-significant increasing trend. Considering the entire province, the trend of the CDD and R95p extreme indices was decreasing (non-significant). The highest decreasing slope of the CDD index with -0.32 days per year, was observed in Parsabad and the highest decreasing slope of the R95p index with -0.87 mm per year, was in observed in Ardabil. In the north of the province, the Rx1day, Rx5day, SDII, and R99p indices were increasing with a slope of +0.07 mm, +0.07 mm, +0.02 mm, and 0.1 mm (per year), respectively. In Ardabil and Khalkhal stations, no significant or a slight decreasing trend was observed. The R10mm index was increasing in Parsabad (0.1 days per year), decreasing in Ardabil (0.07 days per year), while its trend in Khalkhal was non-significant. The trend of changes in total annual precipitation for Khalkhal and Parsabad stations was increasing (non-significant) with a slope of 0.05 and 1.30 mm per year, respectively, and decreasing (non-significant) in Ardabil station with a slope of -1.41 mm. year^-1. In general, none of the extreme precipitation indices in Ardabil province showed significant trend (at the 95% level). The results of the current study can be used in of extreme precipitation events, such as floods and droughts management.