The present invention provides dextrin particles at a low cost which may be used as a component of thickeners that are good in dispersibility in moisture, etc. Fibrous dextrin particles. A thickener comprising the fibrous dextrin particles. A food comprising the fibrous dextrin particles. A method of preparing fibrous dextrin particles, comprising spray drying a dextrin solution with a viscosity of 100 mPa·s or more.