Mala'iku wasu halittu ne da ba a iya gani da ido. Jibrilu da Mika'ilu da Israfil da Azrael su ne mala'iku na kusa guda hudu da aka ambata a cikin Alkur'ani. Ban da wadannan, Harut, Maruta, da Nekiru, wasu mala'iku ne da aka ambaci sunayensu a cikin kur'ani.
Alkur'ani ya lissafo sifofin mala'iku kamar haka;
1- Suna bin umarnin Allah kuma ba sa yin zunubi (Anbiya/27).
2- Suna da ayyuka masu muhimmanci da mabanbantan ra’ayi daga Allah: gungun ‘yan Arshand (Haqqah/17); Kungiya ce mai tsara aiki (Naziat/5); Kungiya ta dauki ran mutum (A'araf/37); Jama'a suna lura da ayyukan mutane (Suratu Infitar/10 zuwa 13); Su rukuni ne na masu kare mutane daga hadurra (An'am/61); kungiyar da aka dora wa alhakin hukunta kabilu masu tayar da kayar baya (Hood/77); Akwai gungun masu taimakon Allah ga muminai a yaƙe-yaƙe (Ahzab/9) daga ƙarshe kuma, akwai ƙungiyar masu kawo littattafan Ubangiji don annabawa (Al-Nahl/2).
3- Suna shagaltuwa da tasbihi (Al-Shura/5).
4-A wasu lokuta sukan dauki siffar mutane suna bayyana ga annabawa da ma wadanda ba annabawa ba. Kamar yadda babban mala’ika mai girma ya bayyana ga Maryamu cikin surar mutum (Maryam/17).
5- Akwai jami'ai daban-daban da matakai daban-daban, wasu suna ruku'u, wasu kuma suna yin sujjada (Safat/166-164).