Rajab is a sacred month in the Islamic calendar that is historically and religiously significant. Muslims regard this month as an opportunity to engage in increased worship, repentance, and preparation for the upcoming Ramadan. There are numerous hadiths about supplementary deeds to be practiced in the month of Rajab. However, some of them are reported as forged hadiths and need to be clarified to our community. Therefore, the objectives of this paperwork are to identify forged hadith focusing on performing sunnah prayers in Rajab and to analyse the chain of narrators and hadith status based on hadith scholars’ reports. This study applies the qualitative method based on library research by collecting data from books, paper works, and websites related to the study. Next, the content analysis method is used to analyse the evaluation and views of hadith scholars by referring to the collection of forged hadith books written by Ibn al-Jawzi, al-Suyuti, al-Shawkani, and Ibn ‘Iraq. The finding shows that there are five topics of forged hadiths related to sunnah prayers in Rajab which are sunnah prayer at the beginning of Rajab, sunnah prayer during the month of Rajab, al-Ragha’ib prayer, Nisf Rajab prayer, and Isra’ Mi’raj prayer.