Being the particle condition carrier in order to improve the absorption of the active ingredient which is due to oral administration, at least one biodegradability polymer and the particle condition carrier which features that it consists of the polymer matrix which at least includes one poly- cation characteristic polymer.経口投与による有効成分の吸収を向上させるための粒子状担体であって、少なくとも1つの生物分解性ポリマーと少なくとも1つのポリカチオン性ポリマーを含むポリマー・マトリックスからなることを特徴とする粒子状担体。