ABSTRAK Tujuan penelitian ini adalah untuk mengetahui pertumbuhan ayam kamaras jantan dengan pemberian ransum komersil yang sebagian disubstitusi dengan tepung ampas tahu + tepung kulit telur + feed supplement. Penelitian ini dilakukan di Laboratorium Lapangan Peternakan (LLP), Program Studi Peternakan, Fakultas Pertanian, Universitas Syiah Kuala, Banda Aceh tanggal 7 Januari‒16 Maret 2016. Penelitian ini menggunakan 64 ekor DOC (Day Old Chick) ayam kamaras produksi Lembaga Agripet Breeding Perkasa (LABP), Medan. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (completely randomized design) terdiri dari 4 perlakuan dan 4 ulangan. Setiap ulangan merupakan unit percobaan yang masing-masing terdiri 4 ekor ayam. Perlakuan yang dicobakan adalah ransum komersil broiler 512 Bravo yang disubtitusi dengan tepung ampas tahu + tepung kulit telur + feed supplement sebanyak 0% (P1), 5%+1%+1% (P2), 10%+2%+1% (P3), dan 15%+3%+1% (P4). Data hasil penelitian ini dianalisis menggunakan Analysis of Variance (ANOVA), jika didapat hasil yang berbeda nyata maka dilanjutkan dengan Uji Jarak Berganda Duncan (Steel dan Torrie, 1993). Parameter yang diamati adalah berat badan akhir, pertambahan berat badan, konsumsi ransum, konversi ransum, dan mortalitas. Hasil penelitian memperlihatkan bahwa meskipun secara statistik perbedaannya tidak nyata (P>0,05), penggunaan tepung ampas tahu + tepung kulit telur + feed supplement cenderung meningkatkan menaikkan berat badan dan pertambahan berat badan, konsumsi ransum, dan memperbaiki angka konversi ransum ayam kamaras. ABSTRACT The purpose of this study was to determine the growth of male kamaras chickens fed a broiler commercial ration partially substituted with tofu waste meal + egg shell meal + feed supplement. The research was conducted at the Field Lab, Department of Animal Husbandry, Faculty of Agriculture, Syiah Kuala University, Banda Aceh on January 7 until March 16, 2016. The study used 64 DOC (Day Old Chick) of male kamaras chickens produced by Lembaga Agripet Breeding Perkasa (LABP), Medan. The study was designed into completely randomized design (CRD) consists of 4 treatments and 4 replications. Each replication was an experimental unit, each comprising four chickens. The treatments were using broiler commercial ration partially substituted with tofu waste meal + egg shell meal + supplement with different level. Data were analyzed using Analysis of Variance (ANOVA), if there was significant different results then continued by Duncan Multiple Range Test (Steel and Torrie 1993). Parameters measured were final body weight (FBW), average body weight gain (BWG), feed intake, and feed conversion. The results of study showed that although statistically no significant effects were detected (P>0.05) using tofu waste meal up to 15% + eggshell meal 3% + feed supplement 1% as a partial substitution of broiler commercial ration tended to increase final body weight, average body weight gain (BWG), and feed intake and repair feed conversion of male kamaras chickens.