Abstract: A connector for a lead of a tissue stimulator such as a cardiac pacer uses a wedging element to fix the lead against inadvertent withdrawal from the pacer header. A wedge member is received in a channel which intersects a bore in the header in which the lead is inserted for connection with a pulse generator. When the wedging member is pressed into its channel, as by simple finger pressure, it engages the lead off-axis, e.g. along a tangent, and forces the lead into tight engagement with the sidewall of the header bore. A present embodiment is adapted for use with a lead which has a deformable covering. The wedge member has a concavity formed therein within which the lead seats. A first end of the wedge member has an upraised portion which is hump-shaped. This upraised portion first cams the lead into engagement with the bore sidewall, and then passes beyond the lead by deforming the lead covering. The lead then seats in the concavity.