To reduce discomfort felt by a wearer.SOLUTION: A wearable device comprises a garment 11 and electrodes L1, L2, R1, R2 fixed to a surface of the garment 11 contacting the body of a wearer 10. A plane dimension of the electrodes L1, L2, R1, R2 in view from the body side of the wearer 10 is configured so that, a maximum of a length of a diagonal line is within 5 cm when the electrodes L1, L2, R1, R2 are formed into a polygon in plan view, a maximum of a diameter is within 5 cm when the electrodes L1, L2, R1, R2 are formed into a circular shape or elliptical shape in plan view, and an interval between a plurality of electrodes applying individually electric stimulus to different positions on the body of the wearer, is 3 cm or greater.SELECTED DRAWING: Figure 1【課題】着用者の不快感を低減する。【解決手段】ウェアラブルデバイスは、衣服１１と、着用者１０の身体と接触する衣服１１の面に固定された電極Ｌ１，Ｌ２，Ｒ１，Ｒ２とを備えている。着用者１０の身体側から見た電極Ｌ１，Ｌ２，Ｒ１，Ｒ２の平面寸法は、電極Ｌ１，Ｌ２，Ｒ１，Ｒ２が平面視多角形の電極の場合、対角線の長さの最大値が５ｃｍ以内、電極Ｌ１，Ｌ２，Ｒ１，Ｒ２が平面視円形または平面視楕円形の電極の場合、径の最大値が５ｃｍ以内であり、着用者の身体の異なる位置に電気刺激を個別に印加する複数の電極間の間隔が３ｃｍ以上である。【選択図】 図１
