A binding machine for gardening includes a main handle to draw out a tape, a clincher arm rotatably attached to the main handle, and a tape gripping device attached to the clincher arm to grip the tape. The tape gripping device includes a support portion, a gripping member, a gripping member urging unit, a lock member and a lock member urging unit. The support portion is provided along a drawing direction of the tape. The gripping member is provided to face the support portion. The gripping member urging unit urges the gripping member toward the support portion. The lock member is engaged with the gripping member to hold the gripping member against an urging force of the gripping member urging unit. The lock member urging unit urges the lock member in an engaging direction with the gripping member. The lock member is rotatably attached to the clincher arm.