A vehicle door latch device, comprising: a housing (11, 12, 13) structured to be provided in a vehicle door; a latch rotatably supported by the housing (11, 12, 13), wherein a striker provided in the vehicle body can be fitted to the latch; a pole having a shaft portion rotatably supported by the housing (11, 12, 14), wherein the pole is engageable with the latch to restrict rotation of the latch; a helical torsion spring having a helical portion through which the shaft portion is passed, a first engaging leg extending radially outward in relation to the helical portion, and a second engaging leg extending radially outward in relation to the helical portion, wherein the first engaging leg is engaged with the pole, and the second engaging leg is engaged with the housing (11, 12, 13), the helical torsion spring always urging the pole to rotate to an engagement position where the pole can be engaged with the latch; and a projecting wall formed in the housing (11, 12, 13), the projecting wall contacting an outer circumferential surface of the helical portion, wherein the housing (11, 12, 13) has a support hole having an inner circumferential surface that slides on an outer circumferential surface of the shaft portion, wherein a clearance is provided between the outer circumferential surface of the shaft portion and the inner circumferential surface of the support hole, the clearance allowing the shaft portion to rotate relative to the support hole, and wherein, at a position opposite to the contacting part of the projecting wall and the helical portion with respect to the shaft portion, the projecting wall maintains a state where the outer circumferential surface of the shaft portion contacts the inner circumferential surface of the support hole. a housing (11, 12, 13) structured to be provided in a vehicle door; a latch rotatably supported by the housing (11, 12, 13), wherein a striker provided in the vehicle body can be fitted to the latch; a pole having a shaft portion rotatably supported by the housing (11, 12, 14), wherein the pole is engageable with the latch to restrict rotation of the latch; a helical torsion spring having a helical portion through which the shaft portion is passed, a first engaging leg extending radially outward in relation to the helical portion, and a second engaging leg extending radially outward in relation to the helical portion, wherein the first engaging leg is engaged with the pole, and the second engaging leg is engaged with the housing (11, 12, 13), the helical torsion spring always urging the pole to rotate to an engagement position where the pole can be engaged with the latch; and a projecting wall formed in the housing (11, 12, 13), the projecting wall contacting an outer circumferential surface of the helical portion, wherein the housing (11, 12, 13) has a support hole having an inner circumferential surface that slides on an outer circumferential surface of the shaft portion, wherein a clearance is provided between the outer circumferential surface of the shaft portion and the inner circumferential surface of the support hole, the clearance allowing the shaft portion to rotate relative to the support hole, and wherein, at a position opposite to the contacting part of the projecting wall and the helical portion with respect to the shaft portion, the projecting wall maintains a state where the outer circumferential surface of the shaft portion contacts the inner circumferential surface of the support hole.