A process for producing aminoalkyl-containing guar derivative is disclosed. The process entails a) dispersing a member selected from the group consisting of guar and guar derivative in a mixture of a water-miscible aprotic solvent and water and b) alkalizing the member with a base to obtain a mixture containing an alkalized member and c) etherifying the mixture with an amino-containing reagent to obtained an etherified mixture and d) optionally neutralizing the etherified mixture to obtain a material system containing a reaction product and e) optionally filtering the material system to obtain the reaction product and f) optionally washing the reaction product and g) optionally drying the reaction product referred to in f) and h) optionally grinding the reaction product. The product thus obtained is suitable for producing hair conditioners and flocculation aids.본 발명은 아미노알킬기를 함유하는 구아검 유도체 및 디알킬아미노 알킬할로겐화물을 이용하여 구아검 또는 구아검 유도체의 유리된 하이드록실기를 에테르화함으로써 이러한 폴리사카라이드 유도체를 제조하는 방법에 관한 것이다.