Oilai khurd, shakli asosii oilai hozirazamonest, ki joi oilai kalonro giriftaast. Az zanu shavhar, farzandoni khonadornashudai onho iborat buda, bazan kheshu tabori beparastorro dar bar megirad. Paydoishi Oilai khurd dar Osiyoi Mnyona ba miyonahoi hazorai 1 milod rost meoyad. To Revolbtsiyai Kabiri Sotsialistii Oktyabr ba Oilai khurd munosibathoi padarshohi khos bud. Baze sardoroni boi Oilai khurd du-se va az in ziyod zan doshtand. Dar natijai khojagii alohida tashkil nadodani pisaron Oilai khurd ba oilai kalon tabdil meyoft.
Dar bayni tojikon ham Oilai khurd shakli asosii oila meboshad. Odatan badi chand vaqti tuy padaru modaron oilai navro bo chizu chorai zaruri tamin karda, khojagiashro chudo mekunand. Dar aksariyati oilaho badi khonador shudan khojagii pisari khudro chudo namekunand. Agar kase khonadomod kunad, oilai nav dar havli (khona)-i khusur va khushdoman zindagi mekunad (nigared niz Nikoh,Oila)