Abstract: A device removably attachable to a binocular allowing accessory items such as radios and cameras to be secured thereto. The device comprises a planar, substantially rectangular support platform having planar upper and lower surfaces and four peripheral edges. Hingedly attached to the lower surface of the support platform are a pair of arcuate walls for abutting and surrounding the binocular barrels. Integrally extending from an edge of each arcuate wall is a curved resilient finger for surrounding an opposing portion of a binocular barrel whereby the barrel may be secured therebetween. First and second straps depend from opposing edges of the support platform which may be wrapped around an accessory item and joined to secure the accessory item on the upper surface thereof. The retaining device may be further secured to a binocular using a pair of bands extending from opposing edges of the support platform which may be wrapped around the binocular and joined to secure the device thereto.