This study is to examine the relation of visual stimuli (shape) and musical composition. Method Subjects. 20 students from Univ. of Music. Experimental stimuli (shape stimuli). See Fig. I. Procedure. The subjects were instructed to look at the shape stimuli, study for a few moments and compose the themes. If they felt revision was necessary, the themes were revised freely. Elements of the themes, Key and Mode, Time Signature, were to be described, Tempo or Pace, Character Directions, Dynamics and Markings, and the Performing Medium would be described, if possible. Results 1) Design A Key : C-dur (17) , E-dur (1) , G-dur (1 ), a-moll (1) Time : 4/4(16), 2/4(1), 3/4(3) Temop : Slow (8), Moderato (6), Fast (3) 2) Design B Key : C-dur (12), D-dur (1), F-dur (2), G-dur (2), g-moll (1), no-key (1) Time : 4/4(6), 2/4(1),3/4(6), 6/8(5) 12/8(1) Temop : Slow (11), Moderato (2), Fast (1) 3) Design C Key : C-dur (11), Es-dur (1), F-dur (1), a-moll (2), no-key (4), change (1) Time : 4/4(8), 2/4(2), 2/2(1), 3/4(5), 6/8(1), 3/8(1), 4/4 ? 3/4 ? 4/4(1), 5/4(1) Temop : Slow (4), Moderato (0), Fast (13) 4) Design D Key : C-dur (11), a-moll (1), c-moll (2), f-moll (1), no-key (3), change (2) Time : 4/4(12), 2/4(3), 2/2(1), 3/4(3), 6/8(1) Temop : Slow (4), Moderato (3), Fast (4) 5) The shape stimuli had various effects on the composition. Especially, there was a close relation between the lines of shapes and the shapes of the melodies.