Ten species of predatory insects were found associated with mosquitoes larvae and pupae in three districts (Mansoura, Talkha, and Miniet El-Nasr) from January 2005 till December 2007 at Dakahlia governorate in the present study. These predatory insects are belonging to three different orders (Heteroptera, Coleoptera, and Odonata) as the following: Order Heteroptera: Micronecta plicata (Costa) (Corixidae), Diplonychus urinator (Durfour) (Belostomatidae), Lethocerus niloticus (Stal) (Belostomatidae), and Anisops sp. (Notonectidae), Order Coleoptera:Rhantus elevatus Sharp (Dytiscidae), and Sternolophus soleiri Laporte de Castelnau (Hydrophilidae), and Order Odonata:Anax imperator Leach (Aeshnidae), Trithemis annulata Pale (Aeshnidae). Pantala flavescens Fabricius (Aeshnidae), and Ishnura senegalensis Rambur (Agrionidae). During season of 2005, the more abundant species was Anisops sp < em>. In addition, it listed the highest percentage in Talkha district (48.43%). But R. elevatus was the next highest predator and it approximately similar in the three districts. Moreover, M. plicata was the next one in Meniet El-Nasr district (12.91%). Meanwhile, L. niloticus represented the lowest percentage to the total predatory insects in Mansoura and Talkha districts but in Meniet El-Nasr district, D.  urinator was the lowest percentage. In season 2006, Anisops sp. was the most abundant predator species (53.80%, 46.90 and 47.65% in Mansoura, Talkha, and Meniet El-Nasr, respectively). The second one was R. elevatus ( 19.88, 16.29 and 21.04% in the three districts, respectively). In addition , L.  niloticus represented the lowest percentage of the total predatory insects in Mansoura and Talkha districts. Whereas in Meniet El-Nasr district, D. urinator was the lowest percentage. During season of 2007, Anisops sp. was the most numerous species (44.02, 47.36, and 49.73%) followed by R. elevatus (19.55, 18.39, and 17.86%), M. plicata (14.35, 12.89, and 10.99% ),and S. soleiri  (5.77, 5.24, and 5.77%) in Mansoura, Talkha and Meniet El-Nasr districts, respectively. Whereas in Mansoura and Talkha districts, L. niloticus was the lowest predator species.