Abstract: An adjustable mounting bracket composed of two strap-like bracket members having elongate concavo-convex ends forming generally oval-shaped cup-like coupling elements disposed in ball and socket-like interfitting relation with the convex side of one element positioned in the concave side of the other element and joined by a fastener which may be loosened to permit ball and socket-like relative angular adjustment of the coupling elements in their lengthwise and transverse directions without relative rotation of the elements and about the fastener and thereby relative angular adjustment of the bracket members. One bracket member has means for attachment to a support and the other bracket member has means for attachment to the article to be supported. The particular mounting bracket described is a generally L-shaped bracket for use as an automobile antenna mount.