The plants' ability to recover from stress conditions is different. Tolerant plants can recover faster and better after stress. This study was conducted to study the ability of recovery of hot- and sweet pepper under high temperature (40°C) based on a factorial experiment under the complete randomized design (CRD) at greenhouses conditions in vegetative and reproductive stages with 3 replicates. Proline, malondialdehyde (MAD), antioxidant, phenol, ion leakage, and hydrogen peroxide increased in both stages under heat stress. Proline and phenol were lower in the reproductive stage compared to the vegetative stage. The highest proline, antioxidant, and phenol contents were in sweet pepper whereas, MDA, hydrogen peroxide and, ion leakage in hot pepper under heat stress. Study the parameters in both stages showed that the vegetative stage was more tolerant to heat stress with increasing antioxidant, phenol, and proline contents in recovery time. Sweet pepper was more tolerant to heat stress with decreasing membrane destruction, increase antioxidant, proline, and phenol contents during recovering time after heat stress.